diff --git a/gpu/command_buffer/client/client_test_helper.h b/gpu/command_buffer/client/client_test_helper.h
index f54a44f2e5da78..c415315a22cd56 100644
--- a/gpu/command_buffer/client/client_test_helper.h
+++ b/gpu/command_buffer/client/client_test_helper.h
@@ -87,7 +87,7 @@ class MockClientCommandBuffer : public CommandBuffer,
 class MockClientCommandBufferMockFlush : public MockClientCommandBuffer {
  public:
   MockClientCommandBufferMockFlush();
-  virtual ~MockClientCommandBufferMockFlush();
+  ~MockClientCommandBufferMockFlush() override;
 
   MOCK_METHOD1(Flush, void(int32_t put_offset));
   MOCK_METHOD1(OrderingBarrier, void(int32_t put_offset));
@@ -99,7 +99,7 @@ class MockClientCommandBufferMockFlush : public MockClientCommandBuffer {
 class MockClientGpuControl : public GpuControl {
  public:
   MockClientGpuControl();
-  virtual ~MockClientGpuControl();
+  ~MockClientGpuControl() override;
 
   MOCK_METHOD1(SetGpuControlClient, void(GpuControlClient*));
   MOCK_CONST_METHOD0(GetCapabilities, const Capabilities&());
diff --git a/gpu/command_buffer/client/cmd_buffer_helper_test.cc b/gpu/command_buffer/client/cmd_buffer_helper_test.cc
index 3a76b384204620..bc100f65936955 100644
--- a/gpu/command_buffer/client/cmd_buffer_helper_test.cc
+++ b/gpu/command_buffer/client/cmd_buffer_helper_test.cc
@@ -41,7 +41,7 @@ const int32_t kUnusedCommandId = 5;  // we use 0 and 2 currently.
 // interface (calling it directly, not through the RPC mechanism).
 class CommandBufferHelperTest : public testing::Test {
  protected:
-  virtual void SetUp() {
+  void SetUp() override {
     transfer_buffer_manager_ = std::make_unique<TransferBufferManager>(nullptr);
     command_buffer_.reset(
         new CommandBufferDirectLocked(transfer_buffer_manager_.get()));
@@ -59,7 +59,7 @@ class CommandBufferHelperTest : public testing::Test {
     test_command_next_id_ = kUnusedCommandId;
   }
 
-  virtual void TearDown() {
+  void TearDown() override {
     // If the CommandExecutor posts any tasks, this forces them to run.
     base::RunLoop().RunUntilIdle();
     test_command_args_.clear();
diff --git a/gpu/command_buffer/client/transfer_buffer_unittest.cc b/gpu/command_buffer/client/transfer_buffer_unittest.cc
index c247a713917a62..0a08b07643f650 100644
--- a/gpu/command_buffer/client/transfer_buffer_unittest.cc
+++ b/gpu/command_buffer/client/transfer_buffer_unittest.cc
@@ -257,7 +257,7 @@ TEST_F(TransferBufferTest, Flush) {
 class MockClientCommandBufferCanFail : public MockClientCommandBufferMockFlush {
  public:
   MockClientCommandBufferCanFail() = default;
-  virtual ~MockClientCommandBufferCanFail() = default;
+  ~MockClientCommandBufferCanFail() override = default;
 
   MOCK_METHOD2(CreateTransferBuffer,
                scoped_refptr<Buffer>(size_t size, int32_t* id));
diff --git a/gpu/command_buffer/service/error_state_mock.h b/gpu/command_buffer/service/error_state_mock.h
index cdfbf92ac337ce..7bd5c2833a728c 100644
--- a/gpu/command_buffer/service/error_state_mock.h
+++ b/gpu/command_buffer/service/error_state_mock.h
@@ -19,7 +19,7 @@ namespace gles2 {
 class MockErrorState : public ErrorState {
  public:
   MockErrorState();
-  virtual ~MockErrorState();
+  ~MockErrorState() override;
 
   MOCK_METHOD0(GetGLError, uint32_t());
   MOCK_METHOD5(SetGLError, void(
diff --git a/gpu/command_buffer/service/gl_context_mock.h b/gpu/command_buffer/service/gl_context_mock.h
index 1a63ad32d65c91..6e2b138ab3ec92 100644
--- a/gpu/command_buffer/service/gl_context_mock.h
+++ b/gpu/command_buffer/service/gl_context_mock.h
@@ -17,7 +17,7 @@ class GLContextMock : public gl::GLContextStub {
   MOCK_METHOD1(MakeCurrent, bool(gl::GLSurface* surface));
 
  protected:
-  virtual ~GLContextMock();
+  ~GLContextMock() override;
 };
 
 }  // namespace gpu
diff --git a/gpu/command_buffer/service/gl_surface_mock.h b/gpu/command_buffer/service/gl_surface_mock.h
index cf77025ee85237..948bc59eb749c0 100644
--- a/gpu/command_buffer/service/gl_surface_mock.h
+++ b/gpu/command_buffer/service/gl_surface_mock.h
@@ -45,7 +45,7 @@ class GLSurfaceMock : public gl::GLSurface {
   MOCK_METHOD0(GetFormat, gl::GLSurfaceFormat());
 
  protected:
-  virtual ~GLSurfaceMock();
+  ~GLSurfaceMock() override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(GLSurfaceMock);
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder_mock.h b/gpu/command_buffer/service/gles2_cmd_decoder_mock.h
index 7c6c2b0e0f4180..21366933edf659 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder_mock.h
+++ b/gpu/command_buffer/service/gles2_cmd_decoder_mock.h
@@ -39,7 +39,7 @@ class MockGLES2Decoder : public GLES2Decoder {
  public:
   MockGLES2Decoder(CommandBufferServiceBase* command_buffer_service,
                    Outputter* outputter);
-  virtual ~MockGLES2Decoder();
+  ~MockGLES2Decoder() override;
 
   base::WeakPtr<DecoderContext> AsWeakPtr() override;
 
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder_unittest.cc b/gpu/command_buffer/service/gles2_cmd_decoder_unittest.cc
index 4c31c047684b34..61f6154295f43b 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder_unittest.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder_unittest.cc
@@ -1086,8 +1086,7 @@ class SizeOnlyMemoryTracker : public MemoryTracker {
   // Ensure a certain amount of GPU memory is free. Returns true on success.
   MOCK_METHOD1(EnsureGPUMemoryAvailable, bool(size_t size_needed));
 
-  virtual void TrackMemoryAllocatedChange(size_t old_size,
-                                          size_t new_size) {
+  void TrackMemoryAllocatedChange(size_t old_size, size_t new_size) override {
     pool_info_.size += new_size - old_size;
   }
 
@@ -1100,7 +1099,7 @@ class SizeOnlyMemoryTracker : public MemoryTracker {
   uint64_t ShareGroupTracingGUID() const override { return 0; }
 
  private:
-  virtual ~SizeOnlyMemoryTracker() = default;
+  ~SizeOnlyMemoryTracker() override = default;
   struct PoolInfo {
     PoolInfo() : initial_size(0), size(0) {}
     size_t initial_size;
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder_unittest_textures.cc b/gpu/command_buffer/service/gles2_cmd_decoder_unittest_textures.cc
index 9aa5db650a6e95..b54f557c135ede 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder_unittest_textures.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder_unittest_textures.cc
@@ -3679,7 +3679,7 @@ class MockGLImage : public gl::GLImage {
                     const std::string&));
 
  protected:
-  virtual ~MockGLImage() = default;
+  ~MockGLImage() override = default;
 };
 
 TEST_P(GLES2DecoderWithShaderTest, CopyTexImage) {
diff --git a/gpu/command_buffer/service/mocks.h b/gpu/command_buffer/service/mocks.h
index 28d0f48c94faa4..7899ce08fdee68 100644
--- a/gpu/command_buffer/service/mocks.h
+++ b/gpu/command_buffer/service/mocks.h
@@ -32,7 +32,7 @@ class AsyncAPIMock : public AsyncAPIInterface {
  public:
   explicit AsyncAPIMock(bool default_do_commands,
                         CommandBufferServiceBase* command_buffer_service);
-  virtual ~AsyncAPIMock();
+  ~AsyncAPIMock() override;
 
   error::Error FakeDoCommands(unsigned int num_commands,
                               const volatile void* buffer,
@@ -119,7 +119,7 @@ class MockShaderTranslator : public ShaderTranslatorInterface {
 class MockProgramCache : public ProgramCache {
  public:
   MockProgramCache();
-  virtual ~MockProgramCache();
+  ~MockProgramCache() override;
 
   MOCK_METHOD7(LoadLinkedProgram,
                ProgramLoadResult(
@@ -160,7 +160,7 @@ class MockMemoryTracker : public MemoryTracker {
  private:
   friend class ::testing::StrictMock<MockMemoryTracker>;
   friend class base::RefCounted< ::testing::StrictMock<MockMemoryTracker> >;
-  virtual ~MockMemoryTracker();
+  ~MockMemoryTracker() override;
 };
 
 }  // namespace gles2
diff --git a/gpu/command_buffer/service/raster_decoder_unittest.cc b/gpu/command_buffer/service/raster_decoder_unittest.cc
index 725d5aace25122..fd1392d0c92845 100644
--- a/gpu/command_buffer/service/raster_decoder_unittest.cc
+++ b/gpu/command_buffer/service/raster_decoder_unittest.cc
@@ -46,7 +46,7 @@ class MockMemoryTracker : public gles2::MemoryTracker {
   uint64_t ShareGroupTracingGUID() const override { return 0; }
 
  private:
-  virtual ~MockMemoryTracker() = default;
+  ~MockMemoryTracker() override = default;
 };
 
 }  // namespace