Restart fullscreen video playback when switching back from background

content/common/view_messages.h

Index: content/common/view_messages.h
diff --git a/content/common/view_messages.h b/content/common/view_messages.h
index 4ad62ce9b57811506a61cc1b46d04c8498a692a3..006315950cc1f64b16aba9c5b299635334fd5e7c 100644
--- a/content/common/view_messages.h
+++ b/content/common/view_messages.h
@@ -1352,6 +1352,10 @@ IPC_MESSAGE_ROUTED0(ViewMsg_ImeEventAck)
 // Sent by the browser when we should pause video playback.
 IPC_MESSAGE_ROUTED0(ViewMsg_PauseVideo);
 
+// Sent by the browser asking the renderer to make the video that
+// exited fullscreen in result of ViewMsg_PauseVideo (if any) to reenter.
+IPC_MESSAGE_ROUTED0(ViewMsg_ResumeFullscreenVideo);
+
 #elif defined(OS_MACOSX)
 // Let the RenderView know its window has changed visibility.
 IPC_MESSAGE_ROUTED1(ViewMsg_SetWindowVisibility,