Gamepad API: add support for connection events

content/browser/renderer_host/gamepad_browser_message_filter.h

Index: content/browser/renderer_host/gamepad_browser_message_filter.h
diff --git a/content/browser/renderer_host/gamepad_browser_message_filter.h b/content/browser/renderer_host/gamepad_browser_message_filter.h
index 8661e71d7dc7ec010f454a71d5419dff817e6099..f8fccf93eed0f745b637d54c54244ae13bd8907b 100644
--- a/content/browser/renderer_host/gamepad_browser_message_filter.h
+++ b/content/browser/renderer_host/gamepad_browser_message_filter.h
@@ -7,6 +7,7 @@
 
 #include "base/compiler_specific.h"
 #include "base/memory/shared_memory.h"
+#include "content/browser/gamepad/gamepad_consumer.h"
 #include "content/public/browser/browser_message_filter.h"
 
 namespace content {
@@ -14,20 +15,30 @@ namespace content {
 class GamepadService;
 class RenderProcessHost;
 
-class GamepadBrowserMessageFilter : public BrowserMessageFilter {
+class GamepadBrowserMessageFilter :
+    public BrowserMessageFilter,
+    public GamepadConsumer {
  public:
-  GamepadBrowserMessageFilter();
+  explicit GamepadBrowserMessageFilter(IPC::Sender* sender);

[jam, 2014/05/05 17:42:59]

this isn't safe, since the filter could outlive RenderProcessHost on its
shutdown. why pass this in anyways? BrowserMessageFilter derives from
IPC::Sender and you can use Send() already

 
   // BrowserMessageFilter implementation.
   virtual bool OnMessageReceived(const IPC::Message& message,
                                  bool* message_was_ok) OVERRIDE;
 
+  virtual void OnGamepadConnected(
+      unsigned index,
+      const blink::WebGamepad& web_gamepad) OVERRIDE;
+  virtual void OnGamepadDisconnected(
+      unsigned index,
+      const blink::WebGamepad& web_gamepad) OVERRIDE;
+
  private:
   virtual ~GamepadBrowserMessageFilter();
 
   void OnGamepadStartPolling(base::SharedMemoryHandle* renderer_handle);
   void OnGamepadStopPolling();
 
+  IPC::Sender* sender_;
   bool is_started_;
 
   DISALLOW_COPY_AND_ASSIGN(GamepadBrowserMessageFilter);