Gamepad API support for chrome on android

content/common/gamepad_messages.h

Index: content/common/gamepad_messages.h
diff --git a/content/common/gamepad_messages.h b/content/common/gamepad_messages.h
index 0532b9c562d0ef21d72b2a1b7162baab48cde730..6391b322046bbf2b9b4f42fb446ad865da3fa16a 100644
--- a/content/common/gamepad_messages.h
+++ b/content/common/gamepad_messages.h
@@ -1,4 +1,5 @@
 // Copyright (c) 2011 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.
 
@@ -21,3 +22,16 @@ IPC_SYNC_MESSAGE_CONTROL0_1(GamepadHostMsg_StartPolling,
                             base::SharedMemoryHandle /* handle */)
 
 IPC_SYNC_MESSAGE_CONTROL0_0(GamepadHostMsg_StopPolling)
+
+#if defined(OS_ANDROID)
+// Asks the browser process to pause/resume polling .The number of resume

[Tom Sepez, 2014/01/10 22:57:39]

Nit: space before period.
Nit: the number of resume messages should match the number of pause messages.
Nit: what happens if its already paused and a new pause comes in? do they nest?
You might want to explain.

+// should match the number of pause.
+IPC_SYNC_MESSAGE_CONTROL0_0(GamepadHostMsg_ResumePolling)
+
+IPC_SYNC_MESSAGE_CONTROL0_0(GamepadHostMsg_PausePolling)
+
+// Sets the last gamepad data access timestamp. It helps identify gamepad

[Tom Sepez, 2014/01/10 22:57:39]

nit: sets it to the current time? I'm not sure I understand you second sentence.

[SaurabhK, 2014/01/13 12:39:27]

Yes, it sets the current time.
It helps to identify if gamepad data is being accessed or not. If gamepad data
is not getting accessed then we can put poll thread to pause state.
Cases like:- Tab switch and browser minimize.
Updating description in next patch-set.

+// data access and release using which polling thread can be put to pause or
+// resume state.
+IPC_SYNC_MESSAGE_CONTROL0_0(GamepadHostMsg_UpdateTimestamp)
+#endif