Revert of Add queryForNewLocalDevices to gcdPrivate

chrome/browser/extensions/api/gcd_private/gcd_private_api.h

Index: chrome/browser/extensions/api/gcd_private/gcd_private_api.h
diff --git a/chrome/browser/extensions/api/gcd_private/gcd_private_api.h b/chrome/browser/extensions/api/gcd_private/gcd_private_api.h
index bf57f454aef6d7d125426d05bf86c542d9ac7c99..42fa26aba21fe135ca0e537540ed24f2078200c0 100644
--- a/chrome/browser/extensions/api/gcd_private/gcd_private_api.h
+++ b/chrome/browser/extensions/api/gcd_private/gcd_private_api.h
@@ -36,8 +36,6 @@
 
   // BrowserContextKeyedAPI implementation.
   static BrowserContextKeyedAPIFactory<GcdPrivateAPI>* GetFactoryInstance();
-
-  bool QueryForDevices();
 
  private:
   friend class BrowserContextKeyedAPIFactory<GcdPrivateAPI>;
@@ -100,7 +98,7 @@
 };
 
 class GcdPrivateQueryForNewLocalDevicesFunction
-    : public ChromeSyncExtensionFunction {
+    : public ChromeAsyncExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("gcdPrivate.queryForNewLocalDevices",
                              GCDPRIVATE_QUERYFORNEWLOCALDEVICES)
@@ -110,8 +108,8 @@
  protected:
   virtual ~GcdPrivateQueryForNewLocalDevicesFunction();
 
-  // SyncExtensionFunction overrides.
-  virtual bool RunSync() OVERRIDE;
+  // AsyncExtensionFunction overrides.
+  virtual bool RunAsync() OVERRIDE;
 };
 
 class GcdPrivateStartSetupFunction : public ChromeAsyncExtensionFunction {