Add audible support to the copresence API.

components/copresence/rpc/rpc_handler_unittest.cc

Index: components/copresence/rpc/rpc_handler_unittest.cc
diff --git a/components/copresence/rpc/rpc_handler_unittest.cc b/components/copresence/rpc/rpc_handler_unittest.cc
index b927065b2b0dab5863ed8e3441ddc90f32329673..a2fa711dfb29f14c715eef0fab620930fc1fbac7 100644
--- a/components/copresence/rpc/rpc_handler_unittest.cc
+++ b/components/copresence/rpc/rpc_handler_unittest.cc
@@ -157,11 +157,9 @@ class RpcHandlerTest : public testing::Test, public CopresenceClientDelegate {
     return "Version String";
   }
 
-  virtual const std::string GetDeviceId() const OVERRIDE {
-    return stored_device_id_;
-  }
+  virtual const std::string GetDeviceId() const { return stored_device_id_; }
 
-  virtual void SaveDeviceId(const std::string& device_id) OVERRIDE {}
+  virtual void SaveDeviceId(const std::string& device_id) {}
 
   virtual WhispernetClient* GetWhispernetClient() OVERRIDE {
     return NULL;