Split up extensions storage API implementations for sync and local storage.

chrome/browser/extensions/api/chrome_extensions_api_client.cc

Index: chrome/browser/extensions/api/chrome_extensions_api_client.cc
diff --git a/chrome/browser/extensions/api/chrome_extensions_api_client.cc b/chrome/browser/extensions/api/chrome_extensions_api_client.cc
index a424bc738eb4f7d8dda667a92daa6ead42854955..73c57d197db0c40c799b3644cfbc624d58d126ce 100644
--- a/chrome/browser/extensions/api/chrome_extensions_api_client.cc
+++ b/chrome/browser/extensions/api/chrome_extensions_api_client.cc
@@ -4,6 +4,9 @@
 
 #include "chrome/browser/extensions/api/chrome_extensions_api_client.h"
 
+#include "chrome/browser/extensions/api/storage/sync_value_store_cache.h"
+#include "content/public/browser/browser_context.h"
+
 #if defined(ENABLE_CONFIGURATION_POLICY)
 #include "chrome/browser/extensions/api/storage/managed_value_store_cache.h"
 #endif
@@ -19,6 +22,10 @@ void ChromeExtensionsAPIClient::AddAdditionalValueStoreCaches(
     const scoped_refptr<SettingsStorageFactory>& factory,
     const scoped_refptr<ObserverListThreadSafe<SettingsObserver> >& observers,
     std::map<settings_namespace::Namespace, ValueStoreCache*>* caches) {
+  // Add support for chrome.storage.sync.
+  (*caches)[settings_namespace::SYNC] =
+      new SyncValueStoreCache(factory, observers, context->GetPath());
+
 #if defined(ENABLE_CONFIGURATION_POLICY)
   // Add support for chrome.storage.managed.
   (*caches)[settings_namespace::MANAGED] =