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

content/renderer/render_view_impl.h

Index: content/renderer/render_view_impl.h
diff --git a/content/renderer/render_view_impl.h b/content/renderer/render_view_impl.h
index 9a9d98688ea08783ad088bdc281acba758000c12..a77e345b1ad77a9b66f62a50106c6aa2d6bd5d41 100644
--- a/content/renderer/render_view_impl.h
+++ b/content/renderer/render_view_impl.h
@@ -483,7 +483,6 @@ class CONTENT_EXPORT RenderViewImpl
   void OnImeConfirmComposition(const base::string16& text,
                                const gfx::Range& replacement_range,
                                bool keep_selection) override;
-  void SetDeviceScaleFactor(float device_scale_factor) override;
   bool SetDeviceColorProfile(const std::vector<char>& color_profile) override;
   void OnOrientationChange() override;
   ui::TextInputType GetTextInputType() override;
@@ -495,6 +494,7 @@ class CONTENT_EXPORT RenderViewImpl
   bool CanComposeInline() override;
   void DidCommitCompositorFrame() override;
   void DidCompletePageScaleAnimation() override;
+  void OnDeviceScaleFactorChanged() override;
 
  protected:
   RenderViewImpl(CompositorDependencies* compositor_deps,
@@ -771,7 +771,7 @@ class CONTENT_EXPORT RenderViewImpl
   void UpdateThemePrefs() {}
 #endif
 
-  void UpdateDeviceScaleFactor();
+  void UpdateWebViewWithDeviceScaleFactor();
 
   // ---------------------------------------------------------------------------
   // ADDING NEW FUNCTIONS? Please keep private functions alphabetized and put