Add display::GetDisplayNearestView

content/browser/renderer_host/render_widget_host_view_base.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_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_BASE_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_BASE_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 62 matching lines @@
 struct NativeWebKeyboardEvent;
 struct TextInputState;
 
 // Basic implementation shared by concrete RenderWidgetHostView subclasses.
 class CONTENT_EXPORT RenderWidgetHostViewBase : public RenderWidgetHostView,
                                                 public IPC::Listener {
  public:
   ~RenderWidgetHostViewBase() override;
 
   float current_device_scale_factor() const {
     return current_device_scale_factor_;

[tapted, 2017/02/15 00:36:10]

Can any callers just use this instead?

(i.e. rather than adding GetScaleFactorForNativeView() - it's confusing having
both)

[Jinsuk Kim, 2017/02/16 10:11:25]

Replaced this with virtual GetScaleFactorForNativeView() instead. The method is
useful to embedders but this class xxx_base  is not public.

   }
 
   // Returns the focused RenderWidgetHost inside this |view|'s RWH.
   RenderWidgetHostImpl* GetFocusedWidget() const;
 
   // RenderWidgetHostView implementation.
   RenderWidgetHost* GetRenderWidgetHost() const override;
   void SetBackgroundColor(SkColor color) override;
   SkColor background_color() override;
   void SetBackgroundColorToDefault() final;
   bool GetBackgroundOpaque() override;
   ui::TextInputClient* GetTextInputClient() override;
   void WasUnOccluded() override {}
   void WasOccluded() override {}
   bool IsShowingContextMenu() const override;
   void SetShowingContextMenu(bool showing_menu) override;
   void SetIsInVR(bool is_in_vr) override;
   base::string16 GetSelectedText() override;
   bool IsMouseLocked() override;
   gfx::Size GetVisibleViewportSize() const override;
   void SetInsets(const gfx::Insets& insets) override;
   void BeginFrameSubscription(
       std::unique_ptr<RenderWidgetHostViewFrameSubscriber> subscriber) override;
   void EndFrameSubscription() override;
   void FocusedNodeTouched(const gfx::Point& location_dips_screen,
                           bool editable) override;
+  float GetScaleFactorForNativeView() const override;
 
   // This only needs to be overridden by RenderWidgetHostViewBase subclasses
   // that handle content embedded within other RenderWidgetHostViews.
   gfx::Point TransformPointToRootCoordSpace(const gfx::Point& point) override;
   gfx::PointF TransformPointToRootCoordSpaceF(
       const gfx::PointF& point) override;
 
   // IPC::Listener implementation:
   bool OnMessageReceived(const IPC::Message& msg) override;
 
@@ skipping 363 matching lines @@
   base::ObserverList<RenderWidgetHostViewBaseObserver> observers_;
 
   base::WeakPtrFactory<RenderWidgetHostViewBase> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewBase);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_BASE_H_