extensions: Add ExtensionView interface.

chrome/browser/ui/views/extensions/extension_view_views.h

Index: chrome/browser/ui/views/extensions/extension_view_views.h
diff --git a/chrome/browser/ui/views/extensions/extension_view_views.h b/chrome/browser/ui/views/extensions/extension_view_views.h
index bb490f6400d2042cafe23b16b9f066214fb5b90f..aea8248f2a759da3b28cfb5e46c8ef76c7d512bd 100644
--- a/chrome/browser/ui/views/extensions/extension_view_views.h
+++ b/chrome/browser/ui/views/extensions/extension_view_views.h
@@ -7,6 +7,7 @@
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
+#include "chrome/browser/extensions/extension_view.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "ui/views/controls/native/native_view_host.h"
 
@@ -22,7 +23,8 @@ class ExtensionHost;
 }
 
 // This handles the display portion of an ExtensionHost.
-class ExtensionViewViews : public views::NativeViewHost {
+class ExtensionViewViews : public ExtensionView,
+                           public views::NativeViewHost {
  public:
   ExtensionViewViews(extensions::ExtensionHost* host, Browser* browser);
   virtual ~ExtensionViewViews();