Add pdf_unittests target.

Needs for https://codereview.chromium.org/2349753003/

Review-Url: https://codereview.chromium.org/2453323002
Cr-Commit-Position: refs/heads/master@{#428066}

pdf/BUILD.gn

@@ -3,6 +3,7 @@
 # found in the LICENSE file.
 
 import("//build/config/features.gni")
+import("//testing/test.gni")
 import("//third_party/pdfium/pdfium.gni")
 
 assert(enable_pdf)
@@ -67,3 +68,20 @@ static_library("pdf") {
     defines += [ "PDF_ENABLE_XFA" ]
   }
 }
+
+test("pdf_unittests") {
+  sources = [
+    "chunk_stream_unittest.cc",
+    "run_all_unittests.cc",
+  ]
+
+  deps = [
+    ":pdf",
+    "//base",
+    "//base/test:test_support",
+    "//ppapi/c",
+    "//ppapi/cpp",
+    "//testing/gmock",
+    "//testing/gtest",
+  ]
+}

pdf/chunk_stream_unittest.cc

@@ -0,0 +1,17 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "pdf/chunk_stream.h"
+
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace chrome_pdf {
+
+TEST(ChunkStreamTest, Simple) {
+  ChunkStream stream;
+  stream.Preallocate(1000);
+  EXPECT_FALSE(stream.IsRangeAvailable(100, 500));
+}
+
+}  // namespace chrome_pdf

pdf/run_all_unittests.cc

@@ -0,0 +1,24 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/test/launcher/unit_test_launcher.h"
+#include "base/test/test_suite.h"
+
+// ppapi_cpp won't link w/o this.
+namespace pp {
+
+class Module;
+
+Module* CreateModule() {
+  return nullptr;
+}
+
+}  // namespace pp
+
+int main(int argc, char** argv) {
+  base::TestSuite test_suite(argc, argv);
+  return base::LaunchUnitTests(
+      argc, argv,
+      base::Bind(&base::TestSuite::Run, base::Unretained(&test_suite)));
+}