Move multiple UI surfaces check to PageActionHandler.

chrome/common/extensions/extension.h

Index: chrome/common/extensions/extension.h
diff --git a/chrome/common/extensions/extension.h b/chrome/common/extensions/extension.h
index 2623f1806e8f3f63bd5f1827b57d6f4425b504ca..cf1f67cdcc8e4afa9d860fe3cd00a1220a95908d 100644
--- a/chrome/common/extensions/extension.h
+++ b/chrome/common/extensions/extension.h
@@ -401,10 +401,6 @@ class Extension : public base::RefCountedThreadSafe<Extension> {
   bool LoadDescription(string16* error);
   bool LoadManifestVersion(string16* error);
 
-  // Returns true if the extension has more than one "UI surface". For example,
-  // an extension that has a browser action and a page action.
-  bool HasMultipleUISurfaces() const;
-
   // Updates the launch URL and extents for the extension using the given
   // |override_url|.
   void OverrideLaunchUrl(const GURL& override_url);