Gamepad API support for chrome on android

content/browser/gamepad/gamepad_provider.cc

Index: content/browser/gamepad/gamepad_provider.cc
diff --git a/content/browser/gamepad/gamepad_provider.cc b/content/browser/gamepad/gamepad_provider.cc
index 55a5f30ed78b6802c7fd6231a13bd0d596c958c8..9c78407b5f935ba8d14de5c801af42da07e78a0f 100644
--- a/content/browser/gamepad/gamepad_provider.cc
+++ b/content/browser/gamepad/gamepad_provider.cc
@@ -1,4 +1,5 @@
 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Copyright (c) 2014, NVIDIA CORPORATION. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
@@ -12,14 +13,19 @@
 #include "base/message_loop/message_loop_proxy.h"
 #include "base/threading/thread.h"
 #include "base/threading/thread_restrictions.h"
+#include "base/time/time.h"
 #include "content/browser/gamepad/gamepad_data_fetcher.h"
 #include "content/browser/gamepad/gamepad_platform_data_fetcher.h"
 #include "content/browser/gamepad/gamepad_provider.h"
+#include "content/browser/gamepad/gamepad_service.h"
 #include "content/common/gamepad_hardware_buffer.h"
 #include "content/common/gamepad_messages.h"
 #include "content/common/gamepad_user_gesture.h"
 
 namespace content {
+#if defined(OS_ANDROID)
+const int64 GamepadProvider::max_timestamp_before_pause_ = 500;
+#endif
 
 GamepadProvider::ClosureAndThread::ClosureAndThread(
     const base::Closure& c,
@@ -63,6 +69,12 @@ base::SharedMemoryHandle GamepadProvider::GetSharedMemoryHandleForProcess(
   return renderer_handle;
 }
 
+#if defined(OS_ANDROID)
+bool GamepadProvider::GetPollState() {
+  return is_paused_;
+}
+#endif
+
 void GamepadProvider::Pause() {
   {
     base::AutoLock lock(is_paused_lock_);
@@ -167,6 +179,17 @@ void GamepadProvider::DoPoll() {
     devices_changed_ = false;
   }
 
+#if defined(OS_ANDROID)
+  base::TimeDelta timestamp =
+      (base::Time::NowFromSystemTime()) - (
+            GamepadService::GetInstance()->GetGamepadAccessTimestamp());
+
+  if (timestamp.InMilliseconds() > max_timestamp_before_pause_) {
+    Pause();
+    return;
+  }
+#endif
+
   // Acquire the SeqLock. There is only ever one writer to this data.
   // See gamepad_hardware_buffer.h.
   hwbuf->sequence.WriteBegin();