Move some extension manifest consistency checks to BackgroundManifestHandler.

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 a2258948cc5cce0e3e7df4292df1efdfc3a86d5f..ed7d94ec254a8ef9c6be6b75cbb88cae55692652 100644
--- a/chrome/common/extensions/extension.h
+++ b/chrome/common/extensions/extension.h
@@ -24,7 +24,6 @@
 #include "chrome/common/extensions/manifest.h"
 #include "chrome/common/extensions/permissions/api_permission.h"
 #include "chrome/common/extensions/permissions/permission_message.h"
-#include "chrome/common/extensions/user_script.h"
 #include "extensions/common/extension_resource.h"
 #include "extensions/common/install_warning.h"
 #include "extensions/common/url_pattern.h"
@@ -372,12 +371,6 @@ class Extension : public base::RefCountedThreadSafe<Extension> {
 
   bool CheckMinimumChromeVersion(string16* error) const;
 
-  // Check that platform app features are valid. Called after InitFromValue.
-  bool CheckPlatformAppFeatures(string16* error) const;
-
-  // Check that features don't conflict. Called after InitFromValue.
-  bool CheckConflictingFeatures(string16* error) const;
-
   // The extension's human-readable name. Name is used for display purpose. It
   // might be wrapped with unicode bidi control characters so that it is
   // displayed correctly in RTL context.