tracing: Make ConvertableToTraceFormat move-only scoped_ptr

android_webview/browser/browser_view_renderer.cc

 // Copyright 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.
 
 #include "android_webview/browser/browser_view_renderer.h"
 
 #include <utility>
 
 #include "android_webview/browser/browser_view_renderer_client.h"
 #include "android_webview/browser/child_frame.h"
@@ skipping 640 matching lines @@
     min_page_scale_factor_ = min_page_scale_factor;
     max_page_scale_factor_ = max_page_scale_factor;
 
     client_->UpdateScrollState(max_scroll_offset(), scrollable_size_dip,
                                page_scale_factor, min_page_scale_factor,
                                max_page_scale_factor);
   }
   SetTotalRootLayerScrollOffset(total_scroll_offset_dip);
 }
 
-scoped_refptr<base::trace_event::ConvertableToTraceFormat>
+scoped_ptr<base::trace_event::ConvertableToTraceFormat>
 BrowserViewRenderer::RootLayerStateAsValue(
     const gfx::Vector2dF& total_scroll_offset_dip,
     const gfx::SizeF& scrollable_size_dip) {
-  scoped_refptr<base::trace_event::TracedValue> state =
-      new base::trace_event::TracedValue();
+  scoped_ptr<base::trace_event::TracedValue> state(
+      new base::trace_event::TracedValue());
 
   state->SetDouble("total_scroll_offset_dip.x", total_scroll_offset_dip.x());
   state->SetDouble("total_scroll_offset_dip.y", total_scroll_offset_dip.y());
 
   state->SetDouble("max_scroll_offset_dip.x", max_scroll_offset_dip_.x());
   state->SetDouble("max_scroll_offset_dip.y", max_scroll_offset_dip_.y());
 
   state->SetDouble("scrollable_size_dip.width", scrollable_size_dip.width());
   state->SetDouble("scrollable_size_dip.height", scrollable_size_dip.height());
 
   state->SetDouble("page_scale_factor", page_scale_factor_);
-  return state;
+  return std::move(state);
 }
 
 void BrowserViewRenderer::DidOverscroll(
     const gfx::Vector2dF& accumulated_overscroll,
     const gfx::Vector2dF& latest_overscroll_delta,
     const gfx::Vector2dF& current_fling_velocity) {
   const float physical_pixel_scale = dip_scale_ * page_scale_factor_;
   if (accumulated_overscroll == latest_overscroll_delta)
     overscroll_rounding_error_ = gfx::Vector2dF();
   gfx::Vector2dF scaled_overscroll_delta =
@@ skipping 115 matching lines @@
   base::StringAppendF(&str,
                       "overscroll_rounding_error_: %s ",
                       overscroll_rounding_error_.ToString().c_str());
   base::StringAppendF(
       &str, "on_new_picture_enable: %d ", on_new_picture_enable_);
   base::StringAppendF(&str, "clear_view: %d ", clear_view_);
   return str;
 }
 
 }  // namespace android_webview