Revert of [blink] Unique pointers in Platform.h

content/public/renderer/content_renderer_client.cc

Index: content/public/renderer/content_renderer_client.cc
diff --git a/content/public/renderer/content_renderer_client.cc b/content/public/renderer/content_renderer_client.cc
index 3beeb1cfc0dc88c9ef3b044cd4d7cf000ac86096..5d421608a14d73a43f859a5ce96dc7cfc46f1f95 100644
--- a/content/public/renderer/content_renderer_client.cc
+++ b/content/public/renderer/content_renderer_client.cc
@@ -6,11 +6,6 @@
 
 #include "content/public/renderer/media_stream_renderer_factory.h"
 #include "media/base/renderer_factory.h"
-#include "third_party/WebKit/public/platform/WebAudioDevice.h"
-#include "third_party/WebKit/public/platform/WebMediaStreamCenter.h"
-#include "third_party/WebKit/public/platform/WebRTCPeerConnectionHandler.h"
-#include "third_party/WebKit/public/platform/WebSpeechSynthesizer.h"
-#include "third_party/WebKit/public/platform/modules/webmidi/WebMIDIAccessor.h"
 #include "ui/gfx/icc_profile.h"
 #include "url/gurl.h"
 
@@ -55,26 +50,25 @@
   closure.Run();
 }
 
-std::unique_ptr<blink::WebMediaStreamCenter>
+blink::WebMediaStreamCenter*
 ContentRendererClient::OverrideCreateWebMediaStreamCenter(
     blink::WebMediaStreamCenterClient* client) {
   return nullptr;
 }
 
-std::unique_ptr<blink::WebRTCPeerConnectionHandler>
+blink::WebRTCPeerConnectionHandler*
 ContentRendererClient::OverrideCreateWebRTCPeerConnectionHandler(
     blink::WebRTCPeerConnectionHandlerClient* client) {
   return nullptr;
 }
 
-std::unique_ptr<blink::WebMIDIAccessor>
+blink::WebMIDIAccessor*
 ContentRendererClient::OverrideCreateMIDIAccessor(
     blink::WebMIDIAccessorClient* client) {
   return nullptr;
 }
 
-std::unique_ptr<blink::WebAudioDevice>
-ContentRendererClient::OverrideCreateAudioDevice(
+blink::WebAudioDevice* ContentRendererClient::OverrideCreateAudioDevice(
     const blink::WebAudioLatencyHint& latency_hint) {
   return nullptr;
 }
@@ -87,8 +81,7 @@
   return nullptr;
 }
 
-std::unique_ptr<blink::WebSpeechSynthesizer>
-ContentRendererClient::OverrideSpeechSynthesizer(
+blink::WebSpeechSynthesizer* ContentRendererClient::OverrideSpeechSynthesizer(
     blink::WebSpeechSynthesizerClient* client) {
   return nullptr;
 }