Add a new resizer corner overlay.

chrome/browser/tab_contents/tab_contents.h

Index: chrome/browser/tab_contents/tab_contents.h
===================================================================
--- chrome/browser/tab_contents/tab_contents.h	(revision 9328)
+++ chrome/browser/tab_contents/tab_contents.h	(working copy)
@@ -399,7 +399,7 @@
 
   // Removes the InfoBar for the specified |delegate|.
   void RemoveInfoBar(InfoBarDelegate* delegate);
-  
+
   // Enumeration and access functions.
   int infobar_delegate_count() const { return infobar_delegates_.size(); }
   InfoBarDelegate* GetInfoBarDelegateAt(int index) {
@@ -407,7 +407,7 @@
   }
 
   // Toolbars and such ---------------------------------------------------------
- 
+
   // Returns whether the bookmark bar should be visible.
   virtual bool IsBookmarkBarAlwaysVisible() { return false; }