[Sync] Move some extension-sync-related logic to ExtensionService

chrome/browser/extensions/mock_extension_service.h

Index: chrome/browser/extensions/mock_extension_service.h
diff --git a/chrome/browser/extensions/mock_extension_service.h b/chrome/browser/extensions/mock_extension_service.h
index 7a6c4b5e19008344c5f0f927e9773c80c0013d4c..68325a5f5c04e6b7c469e79d60333ee4342375da 100644
--- a/chrome/browser/extensions/mock_extension_service.h
+++ b/chrome/browser/extensions/mock_extension_service.h
@@ -10,6 +10,8 @@
 #include <vector>
 
 #include "chrome/browser/extensions/extension_service.h"
+// Needed to keep gmock happy.
+#include "chrome/browser/extensions/extension_sync_data.h"
 #include "testing/gmock/include/gmock/gmock.h"
 
 class MockExtensionService : public ExtensionServiceInterface {
@@ -38,6 +40,10 @@ class MockExtensionService : public ExtensionServiceInterface {
   MOCK_CONST_METHOD1(IsIncognitoEnabled, bool(const std::string&));
   MOCK_METHOD2(SetIsIncognitoEnabled, void(const std::string&, bool));
   MOCK_METHOD0(CheckForUpdatesSoon, void());
+  MOCK_METHOD2(ProcessSyncData,
+               void(const ExtensionSyncData&,
+                    PendingExtensionInfo::ShouldAllowInstallPredicate
+                        should_allow_install));
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_MOCK_EXTENSION_SERVICE_H_