Refactor code listening to platform events in content/renderer/.

content/shell/renderer/test_runner/gamepad_controller.cc

Index: content/shell/renderer/test_runner/gamepad_controller.cc
diff --git a/content/shell/renderer/test_runner/gamepad_controller.cc b/content/shell/renderer/test_runner/gamepad_controller.cc
index 8c4eedf47bce4f6526d3fd7a77bb646d76e1910d..ff334028f8abd1f8491e0d17cf6201bfd0138524 100644
--- a/content/shell/renderer/test_runner/gamepad_controller.cc
+++ b/content/shell/renderer/test_runner/gamepad_controller.cc
@@ -138,7 +138,7 @@ void GamepadControllerBindings::SetAxisData(int index, int axis, double data) {
 }
 
 GamepadController::GamepadController()
-    : listener_(NULL),
+    : RendererGamepadProvider(0),
       weak_factory_(this) {
   Reset();
 }
@@ -163,9 +163,14 @@ void GamepadController::SampleGamepads(blink::WebGamepads& gamepads) {
   memcpy(&gamepads, &gamepads_, sizeof(blink::WebGamepads));
 }
 
-void GamepadController::SetGamepadListener(
-    blink::WebGamepadListener* listener) {
-  listener_ = listener;
+bool GamepadController::OnControlMessageReceived(const IPC::Message& msg) {
+  return false;
+}
+
+void GamepadController::SendStartMessage() {
+}
+
+void GamepadController::SendStopMessage() {
 }
 
 void GamepadController::Connect(int index) {
@@ -184,8 +189,8 @@ void GamepadController::DispatchConnected(int index) {
       || !gamepads_.items[index].connected)
     return;
   const WebGamepad& pad = gamepads_.items[index];
-  if (listener_)
-    listener_->didConnectGamepad(index, pad);
+  if (listener())
+    listener()->didConnectGamepad(index, pad);
 }
 
 void GamepadController::Disconnect(int index) {
@@ -198,8 +203,8 @@ void GamepadController::Disconnect(int index) {
     if (gamepads_.items[i].connected)
       gamepads_.length = i + 1;
   }
-  if (listener_)
-    listener_->didDisconnectGamepad(index, pad);
+  if (listener())
+    listener()->didDisconnectGamepad(index, pad);
 }
 
 void GamepadController::SetId(int index, const std::string& src) {