Initialize CompositorDependencies in RenderWidget's constructor.

components/test_runner/web_test_proxy.h

 // 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.
 
 #ifndef COMPONENTS_TEST_RUNNER_WEB_TEST_PROXY_H_
 #define COMPONENTS_TEST_RUNNER_WEB_TEST_PROXY_H_
 
 #include <deque>
 #include <map>
 #include <string>
@@ skipping 284 matching lines @@
 //  * when a value needs to be overridden by LayoutTests, WebTestProxy can
 //    override RenderViewImpl's getter and call a getter from WebTestProxyBase
 //    instead. In addition, WebTestProxyBase will have a public setter that
 //    could be called from the TestRunner.
 #if defined(OS_WIN)
 // WebTestProxy is a diamond-shaped hierarchy, with WebWidgetClient at the root.
 // VS warns when we inherit the WebWidgetClient method implementations from
 // RenderWidget. It's safe to ignore that warning.
 #pragma warning(disable: 4250)
 #endif
-template <class Base, typename T>
+template <class Base, typename... Args>

[its_nick_at_chromium_org, 2015/07/21 22:08:04]

Wat. Actually wait no, that's amazing.

One of these days I should learn C++.

 class WebTestProxy : public Base, public WebTestProxyBase {
  public:
-  explicit WebTestProxy(T t) : Base(t) {}
+  explicit WebTestProxy(Args... args) : Base(args...) {}
 
   // WebWidgetClient implementation.
   virtual blink::WebScreenInfo screenInfo() {
     blink::WebScreenInfo info = Base::screenInfo();
     WebTestProxyBase::GetScreenOrientationForTesting(info);
     return info;
   }
 
   // WebViewClient implementation.
   virtual void scheduleAnimation() { WebTestProxyBase::ScheduleAnimation(); }
@@ skipping 74 matching lines @@
 
  private:
   virtual ~WebTestProxy() {}
 
   DISALLOW_COPY_AND_ASSIGN(WebTestProxy);
 };
 
 }  // namespace test_runner
 
 #endif  // COMPONENTS_TEST_RUNNER_WEB_TEST_PROXY_H_