Fix header dependency in WebKit/public about testing

third_party/WebKit/public/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/buildflag_header.gni")
 import("//mojo/public/tools/bindings/mojom.gni")
 import("//third_party/WebKit/public/public_features.gni")
 import("//third_party/WebKit/Source/config.gni")
 import("//third_party/WebKit/Source/core/core.gni")
 import("//tools/grit/grit_rule.gni")
 
 if (is_android) {
   import("//build/config/android/rules.gni")
 }
 
 group("blink") {
   public_deps = [
     ":blink_headers",
   ]
   deps = [
     "//third_party/WebKit/Source/core",
     "//third_party/WebKit/Source/platform",
     "//third_party/WebKit/Source/web",
   ]
 }
 
 group("test_support") {
   testonly = true
   public_deps = [
+    ":test_headers",
     "//third_party/WebKit/Source/platform:test_support",
     "//third_party/WebKit/Source/web:test_support",
   ]
 }
 
 group("all_blink") {
   # This includes some test targets. Don't link into production!
   testonly = true
 
   public_deps = [
@@ skipping 39 matching lines @@
   }
 
   android_library("blink_headers_java") {
     deps = [
       "//third_party/android_tools:android_support_annotations_java",
     ]
     srcjar_deps = [ ":blink_headers_java_enums_srcjar" ]
   }
 }
 
+source_set("test_headers") {
+  testonly = true
+  sources = [
+    "platform/scheduler/test/fake_renderer_scheduler.h",
+    "platform/scheduler/test/mock_renderer_scheduler.h",
+    "platform/scheduler/test/renderer_scheduler_test_support.h",
+  ]
+  deps = [
+    "//base:base",
+    "//cc:cc",
+    "//testing/gmock:gmock",
+  ]
+}
+
 # Depend on this target to use public blink API headers for things like enums
 # and public structures without actually linking against any Blink libraries.
 source_set("blink_headers") {
   sources = [
     "platform/BlameContext.h",
     "platform/FilePathConversion.h",
     "platform/InterfaceProvider.h",
     "platform/InterfaceRegistry.h",
     "platform/Platform.h",
     "platform/PointerProperties.h",
@@ skipping 324 matching lines @@
     "platform/modules/serviceworker/WebServiceWorkerSkipWaitingCallbacks.h",
     "platform/modules/serviceworker/WebServiceWorkerState.h",
     "platform/modules/serviceworker/WebServiceWorkerStreamHandle.h",
     "platform/modules/webmidi/WebMIDIAccessor.h",
     "platform/modules/webmidi/WebMIDIAccessorClient.h",
     "platform/scheduler/child/child_scheduler.h",
     "platform/scheduler/child/single_thread_idle_task_runner.h",
     "platform/scheduler/child/webthread_base.h",
     "platform/scheduler/renderer/render_widget_scheduling_state.h",
     "platform/scheduler/renderer/renderer_scheduler.h",
-    "platform/scheduler/test/fake_renderer_scheduler.h",
-    "platform/scheduler/test/mock_renderer_scheduler.h",
-    "platform/scheduler/test/renderer_scheduler_test_support.h",
     "web/WebAXEnums.h",
     "web/WebAXObject.h",
     "web/WebActiveWheelFlingParameters.h",
     "web/WebArrayBuffer.h",
     "web/WebArrayBufferConverter.h",
     "web/WebArrayBufferView.h",
     "web/WebAssociatedURLLoader.h",
     "web/WebAssociatedURLLoaderClient.h",
     "web/WebAssociatedURLLoaderOptions.h",
     "web/WebAutofillClient.h",
@@ skipping 342 matching lines @@
 source_set("shared_typemap_traits") {
   visibility = [ ":*" ]
   sources = [
     "web/ConsoleMessageStructTraits.cpp",
     "web/ConsoleMessageStructTraits.h",
   ]
   deps = [
     ":mojo_bindings_shared__generator",
   ]
 }