Compute the popup location/size correctly when use-zoom-for-dsf is enabled.

content/renderer/render_widget.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_RENDER_WIDGET_H_
 #define CONTENT_RENDERER_RENDER_WIDGET_H_
 
 #include <deque>
 #include <map>
 
@@ skipping 178 matching lines @@
   blink::WebRect rootWindowRect() override;
   blink::WebScreenInfo screenInfo() override;
   void resetInputMethod() override;
   void didHandleGestureEvent(const blink::WebGestureEvent& event,
                              bool event_cancelled) override;
   void didOverscroll(const blink::WebFloatSize& unusedDelta,
                      const blink::WebFloatSize& accumulatedRootOverScroll,
                      const blink::WebFloatPoint& position,
                      const blink::WebFloatSize& velocity) override;
   void showImeIfNeeded() override;
+  void convertViewportToScreen(blink::WebRect* rect) override;
 
 #if defined(OS_ANDROID)
   // Notifies that a tap was not consumed, so showing a UI for the unhandled
   // tap may be needed.
   // Performs various checks on the given WebNode to apply heuristics to
   // determine if triggering is appropriate.
   void showUnhandledTapUIIfNeeded(const blink::WebPoint& tapped_position,
                                   const blink::WebNode& tapped_node,
                                   bool page_changed) override;
 #endif
@@ skipping 223 matching lines @@
   void OnUpdateVideoAck(int32 video_id);
   void OnRequestMoveAck();
   virtual void OnImeSetComposition(
       const base::string16& text,
       const std::vector<blink::WebCompositionUnderline>& underlines,
       int selection_start,
       int selection_end);
   virtual void OnImeConfirmComposition(const base::string16& text,
                                        const gfx::Range& replacement_range,
                                        bool keep_selection);
+  // Called when the device scale factor is changed, or the layer tree is
+  // initialized.
+  virtual void OnDeviceScaleFactorChanged();
+
   void OnRepaint(gfx::Size size_to_paint);
   void OnSyntheticGestureCompleted();
   void OnSetTextDirection(blink::WebTextDirection direction);
   void OnGetFPS();
   void OnUpdateScreenRects(const gfx::Rect& view_screen_rect,
                            const gfx::Rect& window_screen_rect);
   void OnShowImeIfNeeded();
   void OnSetSurfaceIdNamespace(uint32_t surface_id_namespace);
 
 #if defined(OS_ANDROID)
@@ skipping 346 matching lines @@
 
   scoped_ptr<scheduler::RenderWidgetSchedulingState>
       render_widget_scheduling_state_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidget);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_WIDGET_H_