Gamepad: add test support for page visibility behavior

content/renderer/gamepad_shared_memory_reader.h

Index: content/renderer/gamepad_shared_memory_reader.h
diff --git a/content/renderer/gamepad_shared_memory_reader.h b/content/renderer/gamepad_shared_memory_reader.h
index 3846176107c3fdd3bd9276cac8587dd9878e3a4b..eb63867612c034de090fc6052e4a04aff61501ec 100644
--- a/content/renderer/gamepad_shared_memory_reader.h
+++ b/content/renderer/gamepad_shared_memory_reader.h
@@ -9,21 +9,27 @@
 #include "base/memory/shared_memory.h"
 #include "content/common/gamepad_messages.h"
 #include "content/public/renderer/render_process_observer.h"
+#include "content/public/renderer/renderer_gamepad_provider.h"
 #include "third_party/WebKit/public/platform/WebGamepads.h"
 
-namespace blink { class WebGamepadListener; }
-
 namespace content {
 
 struct GamepadHardwareBuffer;
+class RendererWebKitPlatformSupportImpl;
 
-class GamepadSharedMemoryReader : public RenderProcessObserver {
+class GamepadSharedMemoryReader
+    : public RenderProcessObserver,
+      public RendererGamepadProvider {
  public:
-  GamepadSharedMemoryReader();
+  GamepadSharedMemoryReader(
+      RendererWebKitPlatformSupportImpl* webkit_platform_support);
   virtual ~GamepadSharedMemoryReader();
 
-  void SampleGamepads(blink::WebGamepads& gamepads);
-  void SetGamepadListener(blink::WebGamepadListener* listener);
+  // RendererGamepadProvider implementation.
+  virtual void SampleGamepads(
+      blink::WebGamepads& gamepads) OVERRIDE;
+  virtual void SetGamepadListener(
+      blink::WebGamepadListener* listener) OVERRIDE;
 
   // RenderProcessObserver implementation.
   virtual bool OnControlMessageReceived(const IPC::Message& message) OVERRIDE;