Enable permission warnings from ManifestHandlers.

chrome/common/extensions/manifest_handler.h

Index: chrome/common/extensions/manifest_handler.h
diff --git a/chrome/common/extensions/manifest_handler.h b/chrome/common/extensions/manifest_handler.h
index 42f989bc4bb0e9dc53617d0773be08257fd02aef..431188e73980b44d1e3a4010c2ece834d9d1b63d 100644
--- a/chrome/common/extensions/manifest_handler.h
+++ b/chrome/common/extensions/manifest_handler.h
@@ -64,6 +64,13 @@ class ManifestHandler {
   // (new MyManifestHandler)->Register();
   void Register();
 
+  virtual void AddPermissionWarningMessages(
+      const Extension* extension,
+      std::vector<string16>& messages) const;
+  virtual void AddPermissionWarningMessagesDetails(
+    const Extension* extension,
+    std::vector<string16>& messages) const;
+
   // Calling FinalizeRegistration indicates that there are no more
   // manifest handlers to be registered.
   static void FinalizeRegistration();
@@ -79,6 +86,11 @@ class ManifestHandler {
                                 std::string* error,
                                 std::vector<InstallWarning>* warnings);
 
+  static std::vector<string16> GetExtensionPermissionWarningMessages(
+      const Extension* extension);
+  static std::vector<string16> GetExtensionPermissionWarningMessagesDetails(
+      const Extension* extension);
+
  protected:
   // A convenience method for handlers that only register for 1 key,
   // so that they can define keys() { return SingleKey(kKey); }
@@ -108,6 +120,11 @@ class ManifestHandlerRegistry {
                          std::string* error,
                          std::vector<InstallWarning>* warnings);
 
+  std::vector<string16> GetExtensionPermissionWarningMessages(
+      const Extension* extension);
+  std::vector<string16> GetExtensionPermissionWarningMessagesDetails(
+      const Extension* extension);
+
   // Overrides the current global ManifestHandlerRegistry with
   // |registry|, returning the current one.
   static ManifestHandlerRegistry* SetForTesting(