Convert utility process extension ParseUpdate IPC to mojo

chrome/utility/extensions/extensions_handler.h

Index: chrome/utility/extensions/extensions_handler.h
diff --git a/chrome/utility/extensions/extensions_handler.h b/chrome/utility/extensions/extensions_handler.h
index bdeb3592f338bdafbe92e662cb0f9a2f46e6159e..9c3c6e06e0de9c718f1119bf0828d5ff8a3a3bb8 100644
--- a/chrome/utility/extensions/extensions_handler.h
+++ b/chrome/utility/extensions/extensions_handler.h
@@ -8,7 +8,6 @@
 #include <stdint.h>
 
 #include "base/base64.h"
-#include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "build/build_config.h"
 #include "chrome/common/media_galleries/picasa_types.h"
@@ -27,6 +26,8 @@ class InterfaceRegistry;
 namespace extensions {
 
 // Dispatches IPCs for Chrome extensions utility messages.
+// Note: these IPC are deprecated so there is no need to convert
+// them to mojo. https://crbug.com/680928
 class ExtensionsHandler : public UtilityMessageHandler {
  public:
   ExtensionsHandler();
@@ -34,8 +35,6 @@ class ExtensionsHandler : public UtilityMessageHandler {
 
   static void PreSandboxStartup();
 
-  // TODO(noel): consider moving this API to the UtilityMessageHandler
-  // interface.
   static void ExposeInterfacesToBrowser(
       service_manager::InterfaceRegistry* registry,
       bool running_elevated);
@@ -61,8 +60,6 @@ class ExtensionsHandler : public UtilityMessageHandler {
       const std::vector<picasa::FolderINIContents>& folders_inis);
 #endif  // defined(OS_WIN) || defined(OS_MACOSX)
 
-  UtilityHandler utility_handler_;
-
   DISALLOW_COPY_AND_ASSIGN(ExtensionsHandler);
 };