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

content/public/renderer/render_view.h

Index: content/public/renderer/render_view.h
diff --git a/content/public/renderer/render_view.h b/content/public/renderer/render_view.h
index 1f0a2358e606ba01c81b3ebb29548c57ba47f523..a2d4425cf005f7f8ef1af2df019c89437d09e7cd 100644
--- a/content/public/renderer/render_view.h
+++ b/content/public/renderer/render_view.h
@@ -124,11 +124,9 @@ class CONTENT_EXPORT RenderView : public IPC::Sender {
                                       bool animate) = 0;
 #endif
 
-  // Converts the |rect| from Blink's Viewport coordinates to the
-  // coordinates in the native window used to display the content, in
-  // DIP.  They're identical in tradional world, but will differ when
-  // use-zoom-for-dsf feature is eanbled, and Viewport coordinates
-  // becomes DSF times larger than window coordinates.
+  // Converts the |rect| from Blink's Viewport coordinates to Window
+  // coordinates. See the comment on
+  // WebWidgetClient::convertViewportToWindow() for more details.
   virtual void convertViewportToWindow(blink::WebRect* rect) = 0;
 
  protected: