Nuke WebPassOwnPtr<T> and replace it with std::unique_ptr<T>.

components/scheduler/renderer/web_view_scheduler_impl.h

 // Copyright 2015 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_SCHEDULER_RENDERER_WEB_VIEW_SCHEDULER_IMPL_H_
 #define COMPONENTS_SCHEDULER_RENDERER_WEB_VIEW_SCHEDULER_IMPL_H_
 
 #include <set>
 #include <string>
 
@@ skipping 23 matching lines @@
 class SCHEDULER_EXPORT WebViewSchedulerImpl : public blink::WebViewScheduler {
  public:
   WebViewSchedulerImpl(blink::WebView* web_view,
                        RendererSchedulerImpl* renderer_scheduler,
                        bool disable_background_timer_throttling);
 
   ~WebViewSchedulerImpl() override;
 
   // blink::WebViewScheduler implementation:
   void setPageVisible(bool page_visible) override;
-  blink::WebPassOwnPtr<blink::WebFrameScheduler> createFrameScheduler(
+  std::unique_ptr<blink::WebFrameScheduler> createFrameScheduler(
       blink::BlameContext* blame_context) override;
   void enableVirtualTime() override;
   void setAllowVirtualTimeToAdvance(
       bool allow_virtual_time_to_advance) override;
 
   // Virtual for testing.
   virtual void AddConsoleWarning(const std::string& message);
 
   scoped_ptr<WebFrameSchedulerImpl> createWebFrameSchedulerImpl(
       base::trace_event::BlameContext* blame_context);
@@ skipping 15 matching lines @@
   bool page_visible_;
   bool disable_background_timer_throttling_;
   bool allow_virtual_time_to_advance_;
 
   DISALLOW_COPY_AND_ASSIGN(WebViewSchedulerImpl);
 };
 
 }  // namespace scheduler
 
 #endif  // COMPONENTS_SCHEDULER_RENDERER_WEB_VIEW_SCHEDULER_IMPL_H_