Adding the page and DPI scale adjustment for Autofill Popups.

chrome/renderer/autofill/autofill_agent.h

Index: chrome/renderer/autofill/autofill_agent.h
diff --git a/chrome/renderer/autofill/autofill_agent.h b/chrome/renderer/autofill/autofill_agent.h
index 14c098a88d3ff852386c162bd630b1547656fc9e..ef90f91dd7f13a7380767da7e7f8a41c0c15d2a3 100644
--- a/chrome/renderer/autofill/autofill_agent.h
+++ b/chrome/renderer/autofill/autofill_agent.h
@@ -23,6 +23,7 @@ struct FormFieldData;
 
 namespace WebKit {
 class WebNode;
+class WebView;
 }
 
 namespace autofill {
@@ -222,6 +223,9 @@ class AutofillAgent : public content::RenderViewObserver,
   // elements can be clicked.
   WebKit::WebFrame* topmost_frame_;
 
+  // Pointer to the WebView. Used to access page scale factor.
+  WebKit::WebView* web_view_;
+
   // Should we display a warning if autofill is disabled?
   bool display_warning_if_disabled_;