Abstract base 'ExtensionView' to Fix DEPS violation in extension_view_host.h

chrome/browser/ui/views/infobars/extension_infobar.h

Index: chrome/browser/ui/views/infobars/extension_infobar.h
diff --git a/chrome/browser/ui/views/infobars/extension_infobar.h b/chrome/browser/ui/views/infobars/extension_infobar.h
index c2aaa698d2b9ddd07f6579a318da81e95c69d80a..2f1d55a35ff2488f05183af89d8f7fd12d9ae4c1 100644
--- a/chrome/browser/ui/views/infobars/extension_infobar.h
+++ b/chrome/browser/ui/views/infobars/extension_infobar.h
@@ -11,6 +11,7 @@
 
 class Browser;
 class ExtensionInfoBarDelegate;
+class ExtensionViewViews;
 
 namespace views {
 class ImageView;
@@ -39,6 +40,8 @@ class ExtensionInfoBar : public InfoBarView,
   void OnImageLoaded(const gfx::Image& image);
   ExtensionInfoBarDelegate* GetDelegate();
   const ExtensionInfoBarDelegate* GetDelegate() const;
+  ExtensionViewViews* GetExtensionView();
+  const ExtensionViewViews* GetExtensionView() const;
 
   // Returns the width of all content other than the extension view.  Layout()
   // uses this to determine how much space the extension view can take.