WebKit LayoutTests needs more resources.

It needs the PerformanceTests directory. This should fix the following
failures;
 * fast/harness/perftests/perf-runner-compute-statistics.html
 * fast/harness/perftests/runs-per-second-iterations.html
 * fast/harness/perftests/runs-per-second-log.html
 * fast/harness/perftests/measure-frame-time.html
 * fast/harness/perftests/measure-time.html
Which are failing with;
 CONSOLE ERROR: line 66: Uncaught ReferenceError: PerfTestRunner is not
 defined

It needs the extracted devtools resources (bug https://crbug.com/693723
created for this). This should fix the following failures;
 * inspector-protocol/heap-profiler/heap-samples-in-snapshot.html
 * inspector-protocol/heap-profiler/heap-snapshot-with-active-dom-object.html
 * inspector-protocol/heap-profiler/heap-snapshot-with-detached-dom-tree.html
 * inspector-protocol/heap-profiler/heap-snapshot-with-event-listener.html
Which are failing with;
 TypeError: HeapSnapshotWorker.HeapSnapshotLoader is not a constructor

BUG=52475,693723
NOTRY=true

Review-Url: https://codereview.chromium.org/2705653002
Cr-Commit-Position: refs/heads/master@{#451412}

BUILD.gn

@@ -931,6 +931,7 @@ if (!is_ios) {
     testonly = true
     data_deps = [
       "//content/shell:content_shell",
+      "//third_party/WebKit/public:blink_devtools_frontend_resources_files",
       "//third_party/mesa:osmesa",
       "//tools/imagediff",
     ]
@@ -968,6 +969,7 @@ if (!is_ios) {
       "//testing/xvfb.py",
       "//testing/scripts/run_isolated_script_test.py",
       "//third_party/WebKit/LayoutTests/",
+      "//third_party/WebKit/PerformanceTests/",
       "//third_party/WebKit/Tools/Scripts/",
       "$root_build_dir/resources/inspector/",
     ]

third_party/WebKit/Source/devtools/BUILD.gn

@@ -870,6 +870,10 @@ devtools_applications = [
 
 visibility = [ "//third_party/WebKit/*" ]
 
+group("devtools_all_files") {
+  data = all_devtools_files
+}
+
 group("devtools_frontend_resources") {
   public_deps = [
     ":build_release_devtools",

third_party/WebKit/public/BUILD.gn

@@ -599,6 +599,12 @@ group("blink_devtools_frontend_resources") {
   ]
 }
 
+group("blink_devtools_frontend_resources_files") {
+  data_deps = [
+    "//third_party/WebKit/Source/devtools:devtools_all_files",
+  ]
+}
+
 group("blink_generate_devtools_grd") {
   public_deps = [
     "//third_party/WebKit/Source/devtools:generate_devtools_grd",