Revert of [blink] Unique pointers in Platform.h

content/shell/renderer/layout_test/layout_test_content_renderer_client.h

 // Copyright (c) 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 CONTENT_SHELL_RENDERER_LAYOUT_TEST_LAYOUT_TEST_CONTENT_RENDERER_CLIENT_H_
 #define CONTENT_SHELL_RENDERER_LAYOUT_TEST_LAYOUT_TEST_CONTENT_RENDERER_CLIENT_H_
 
 #include <memory>
 
 #include "content/shell/renderer/shell_content_renderer_client.h"
 
 namespace content {
 
 class LayoutTestRenderThreadObserver;
 class MockWebClipboardImpl;
 
 class LayoutTestContentRendererClient : public ShellContentRendererClient {
  public:
   LayoutTestContentRendererClient();
   ~LayoutTestContentRendererClient() override;
 
   // ShellContentRendererClient implementation.
   void RenderThreadStarted() override;
   void RenderFrameCreated(RenderFrame* render_frame) override;
   void RenderViewCreated(RenderView* render_view) override;
-  std::unique_ptr<blink::WebMediaStreamCenter>
-  OverrideCreateWebMediaStreamCenter(
+  blink::WebMediaStreamCenter* OverrideCreateWebMediaStreamCenter(
       blink::WebMediaStreamCenterClient* client) override;
-  std::unique_ptr<blink::WebRTCPeerConnectionHandler>
-  OverrideCreateWebRTCPeerConnectionHandler(
+  blink::WebRTCPeerConnectionHandler* OverrideCreateWebRTCPeerConnectionHandler(
       blink::WebRTCPeerConnectionHandlerClient* client) override;
-  std::unique_ptr<blink::WebMIDIAccessor> OverrideCreateMIDIAccessor(
+  blink::WebMIDIAccessor* OverrideCreateMIDIAccessor(
       blink::WebMIDIAccessorClient* client) override;
-  std::unique_ptr<blink::WebAudioDevice> OverrideCreateAudioDevice(
+  blink::WebAudioDevice* OverrideCreateAudioDevice(
       const blink::WebAudioLatencyHint& latency_hint) override;
   blink::WebClipboard* OverrideWebClipboard() override;
   blink::WebThemeEngine* OverrideThemeEngine() override;
   std::unique_ptr<MediaStreamRendererFactory> CreateMediaStreamRendererFactory()
       override;
   std::unique_ptr<gfx::ICCProfile> GetImageDecodeColorProfile() override;
   void DidInitializeWorkerContextOnWorkerThread(
       v8::Local<v8::Context> context) override;
   void SetRuntimeFeaturesDefaultsBeforeBlinkInitialization() override;
 
  private:
   std::unique_ptr<LayoutTestRenderThreadObserver> shell_observer_;
   std::unique_ptr<MockWebClipboardImpl> clipboard_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_SHELL_RENDERER_LAYOUT_TEST_LAYOUT_TEST_CONTENT_RENDERER_CLIENT_H_