Move //components/test_runner back into //content/shell

components/test_runner/gc_controller.cc

-// 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.
-
-#include "components/test_runner/gc_controller.h"
-
-#include "gin/arguments.h"
-#include "gin/handle.h"
-#include "gin/object_template_builder.h"
-#include "third_party/WebKit/public/web/WebFrame.h"
-#include "third_party/WebKit/public/web/WebKit.h"
-#include "v8/include/v8.h"
-
-namespace test_runner {
-
-gin::WrapperInfo GCController::kWrapperInfo = {gin::kEmbedderNativeGin};
-
-// static
-void GCController::Install(blink::WebFrame* frame) {
-  v8::Isolate* isolate = blink::mainThreadIsolate();
-  v8::HandleScope handle_scope(isolate);
-  v8::Local<v8::Context> context = frame->mainWorldScriptContext();
-  if (context.IsEmpty())
-    return;
-
-  v8::Context::Scope context_scope(context);
-
-  gin::Handle<GCController> controller =
-      gin::CreateHandle(isolate, new GCController());
-  if (controller.IsEmpty())
-    return;
-  v8::Local<v8::Object> global = context->Global();
-  global->Set(gin::StringToV8(isolate, "GCController"), controller.ToV8());
-}
-
-GCController::GCController() {}
-
-GCController::~GCController() {}
-
-gin::ObjectTemplateBuilder GCController::GetObjectTemplateBuilder(
-    v8::Isolate* isolate) {
-  return gin::Wrappable<GCController>::GetObjectTemplateBuilder(isolate)
-      .SetMethod("collect", &GCController::Collect)
-      .SetMethod("collectAll", &GCController::CollectAll)
-      .SetMethod("minorCollect", &GCController::MinorCollect);
-}
-
-void GCController::Collect(const gin::Arguments& args) {
-  args.isolate()->RequestGarbageCollectionForTesting(
-      v8::Isolate::kFullGarbageCollection);
-}
-
-void GCController::CollectAll(const gin::Arguments& args) {
-  // In order to collect a DOM wrapper, two GC cycles are needed.
-  // In the first GC cycle, a weak callback of the DOM wrapper is called back
-  // and the weak callback disposes a persistent handle to the DOM wrapper.
-  // In the second GC cycle, the DOM wrapper is reclaimed.
-  // Given that two GC cycles are needed to collect one DOM wrapper,
-  // more than two GC cycles are needed to collect all DOM wrappers
-  // that are chained. Seven GC cycles look enough in most tests.
-  for (int i = 0; i < 7; i++) {
-    args.isolate()->RequestGarbageCollectionForTesting(
-        v8::Isolate::kFullGarbageCollection);
-  }
-}
-
-void GCController::MinorCollect(const gin::Arguments& args) {
-  args.isolate()->RequestGarbageCollectionForTesting(
-      v8::Isolate::kMinorGarbageCollection);
-}
-
-}  // namespace test_runner