Cleanup many APIs to use ProfileKeyedAPI.

chrome/browser/extensions/api/sync_file_system/extension_sync_event_observer.h

Index: chrome/browser/extensions/api/sync_file_system/extension_sync_event_observer.h
diff --git a/chrome/browser/extensions/api/sync_file_system/extension_sync_event_observer.h b/chrome/browser/extensions/api/sync_file_system/extension_sync_event_observer.h
index 78055eb97814e63f14eb01b70897cfba8b505304..491e9b0725708db84cd83d4d5265995ea883e014 100644
--- a/chrome/browser/extensions/api/sync_file_system/extension_sync_event_observer.h
+++ b/chrome/browser/extensions/api/sync_file_system/extension_sync_event_observer.h
@@ -9,8 +9,8 @@
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/values.h"
+#include "chrome/browser/extensions/api/profile_keyed_api_factory.h"
 #include "chrome/browser/sync_file_system/sync_event_observer.h"
-#include "components/browser_context_keyed_service/browser_context_keyed_service.h"
 
 class Profile;
 
@@ -21,10 +21,12 @@ class SyncFileSystemService;
 namespace extensions {
 
 // Observes changes in SyncFileSystem and relays events to JS Extension API.
-class ExtensionSyncEventObserver
-    : public sync_file_system::SyncEventObserver,
-      public BrowserContextKeyedService {
+class ExtensionSyncEventObserver : public sync_file_system::SyncEventObserver,
+                                   public ProfileKeyedAPI {
  public:
+  static ProfileKeyedAPIFactory<ExtensionSyncEventObserver>*
+      GetFactoryInstance();
+
   explicit ExtensionSyncEventObserver(Profile* profile);
   virtual ~ExtensionSyncEventObserver();
 
@@ -47,10 +49,16 @@ class ExtensionSyncEventObserver
       sync_file_system::SyncDirection direction) OVERRIDE;
 
  private:
+  friend class ProfileKeyedAPIFactory<ExtensionSyncEventObserver>;
+
   // Returns an empty string if the extension |app_origin| cannot be found
   // in the installed extension list.
   std::string GetExtensionId(const GURL& app_origin);
 
+  // ProfileKeyedAPI implementation.
+  static const char* service_name() { return "ExtensionSyncEventObserver"; }
+  static const bool kServiceIsCreatedWithBrowserContext = false;
+
   Profile* profile_;
 
   // Not owned. If not null, then this is registered to SyncFileSystemService.
@@ -63,6 +71,10 @@ class ExtensionSyncEventObserver
   DISALLOW_COPY_AND_ASSIGN(ExtensionSyncEventObserver);
 };
 
+template <>
+void ProfileKeyedAPIFactory<
+    ExtensionSyncEventObserver>::DeclareFactoryDependencies();
+
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_SYNC_FILE_SYSTEM_EXTENSION_SYNC_EVENT_OBSERVER_H_