Warn on missing OVERRIDE/virtual everywhere, not just in header files.

chromeos/dbus/experimental_bluetooth_device_client.cc

Index: chromeos/dbus/experimental_bluetooth_device_client.cc
diff --git a/chromeos/dbus/experimental_bluetooth_device_client.cc b/chromeos/dbus/experimental_bluetooth_device_client.cc
index 9de3c940e9f3d66eae2d9058779921525f5f8263..7cfc88f7089b5049bc60249316428dd0570945d3 100644
--- a/chromeos/dbus/experimental_bluetooth_device_client.cc
+++ b/chromeos/dbus/experimental_bluetooth_device_client.cc
@@ -86,9 +86,10 @@ class ExperimentalBluetoothDeviceClientImpl
   virtual dbus::PropertySet* CreateProperties(
       dbus::ObjectProxy* object_proxy,
       const dbus::ObjectPath& object_path,
-      const std::string& interface_name) {
+      const std::string& interface_name) OVERRIDE {
     Properties* properties = new Properties(
-        object_proxy, interface_name,
+        object_proxy,
+        interface_name,
         base::Bind(&ExperimentalBluetoothDeviceClientImpl::OnPropertyChanged,
                    weak_ptr_factory_.GetWeakPtr(),
                    object_path));
@@ -278,17 +279,19 @@ class ExperimentalBluetoothDeviceClientImpl
  private:
   // Called by dbus::ObjectManager when an object with the device interface
   // is created. Informs observers.
-  void ObjectAdded(const dbus::ObjectPath& object_path,
-                   const std::string& interface_name) OVERRIDE {
-    FOR_EACH_OBSERVER(ExperimentalBluetoothDeviceClient::Observer, observers_,
+  virtual void ObjectAdded(const dbus::ObjectPath& object_path,
+                           const std::string& interface_name) OVERRIDE {
+    FOR_EACH_OBSERVER(ExperimentalBluetoothDeviceClient::Observer,
+                      observers_,
                       DeviceAdded(object_path));
   }
 
   // Called by dbus::ObjectManager when an object with the device interface
   // is removed. Informs observers.
-  void ObjectRemoved(const dbus::ObjectPath& object_path,
-                     const std::string& interface_name) OVERRIDE {
-    FOR_EACH_OBSERVER(ExperimentalBluetoothDeviceClient::Observer, observers_,
+  virtual void ObjectRemoved(const dbus::ObjectPath& object_path,
+                             const std::string& interface_name) OVERRIDE {
+    FOR_EACH_OBSERVER(ExperimentalBluetoothDeviceClient::Observer,
+                      observers_,
                       DeviceRemoved(object_path));
   }