Revert of [blink] Unique pointers in Platform.h

content/shell/test_runner/web_test_interfaces.h

Index: content/shell/test_runner/web_test_interfaces.h
diff --git a/content/shell/test_runner/web_test_interfaces.h b/content/shell/test_runner/web_test_interfaces.h
index f6f7975ed5f0e19d8e22118182bc005740b54b9e..64ce164acfdfb0a56e3c54ae77e2e78e024dc612 100644
--- a/content/shell/test_runner/web_test_interfaces.h
+++ b/content/shell/test_runner/web_test_interfaces.h
@@ -53,18 +53,16 @@
   WebTestRunner* TestRunner();
   blink::WebThemeEngine* ThemeEngine();
 
-  std::unique_ptr<blink::WebMediaStreamCenter> CreateMediaStreamCenter(
+  blink::WebMediaStreamCenter* CreateMediaStreamCenter(
       blink::WebMediaStreamCenterClient* client);
-  std::unique_ptr<blink::WebRTCPeerConnectionHandler>
-  CreateWebRTCPeerConnectionHandler(
+  blink::WebRTCPeerConnectionHandler* CreateWebRTCPeerConnectionHandler(
       blink::WebRTCPeerConnectionHandlerClient* client);
 
-  std::unique_ptr<blink::WebMIDIAccessor> CreateMIDIAccessor(
+  blink::WebMIDIAccessor* CreateMIDIAccessor(
       blink::WebMIDIAccessorClient* client);
 
-  std::unique_ptr<blink::WebAudioDevice> CreateAudioDevice(
-      double sample_rate,
-      int frames_per_buffer);
+  blink::WebAudioDevice* CreateAudioDevice(double sample_rate,
+                                           int frames_per_buffer);
 
   TestInterfaces* GetTestInterfaces();