Mandate unique_ptr for base::IDMap in IDMapOwnPointer mode.

content/renderer/renderer_blink_platform_impl.h

 // Copyright (c) 2012 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_RENDERER_RENDERER_BLINK_PLATFORM_IMPL_H_
 #define CONTENT_RENDERER_RENDERER_BLINK_PLATFORM_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 223 matching lines @@
     return web_database_observer_impl_.get();
   }
 
   blink::WebURLLoader* createURLLoader() override;
 
  private:
   bool CheckPreparsedJsCachingEnabled() const;
 
   // Factory that takes a type and return PlatformEventObserverBase that matches
   // it.
-  static PlatformEventObserverBase* CreatePlatformEventObserverFromType(
-      blink::WebPlatformEventType type);
+  static std::unique_ptr<PlatformEventObserverBase>
+  CreatePlatformEventObserverFromType(blink::WebPlatformEventType type);
 
   // Use the data previously set via SetMockDevice...DataForTesting() and send
   // them to the registered listener.
   void SendFakeDeviceEventDataForTesting(blink::WebPlatformEventType type);
 
   std::unique_ptr<blink::WebThread> main_thread_;
 
   std::unique_ptr<RendererClipboardDelegate> clipboard_delegate_;
   std::unique_ptr<WebClipboardImpl> clipboard_;
 
@@ skipping 45 matching lines @@
   std::unique_ptr<BlinkInterfaceProviderImpl> blink_interface_provider_;
 
   mojom::URLLoaderFactoryAssociatedPtr url_loader_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RendererBlinkPlatformImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDERER_BLINK_PLATFORM_IMPL_H_