Infrastructure for temportarily relinquishing GPU resources.

content/common/gpu/gpu_messages.h

Index: content/common/gpu/gpu_messages.h
diff --git a/content/common/gpu/gpu_messages.h b/content/common/gpu/gpu_messages.h
index 839de2d55a966c6ffa14103d08ecc30aee75f7b0..762f31e064ddfba59a3df5becd58b90c42e6dfc8 100644
--- a/content/common/gpu/gpu_messages.h
+++ b/content/common/gpu/gpu_messages.h
@@ -301,6 +301,11 @@ IPC_MESSAGE_CONTROL0(GpuMsg_DisableWatchdog)
 // Tells the GPU process that the browser has seen a GPU switch.
 IPC_MESSAGE_CONTROL0(GpuMsg_GpuSwitched)
 
+// Tells the GPU process to relinquish the display to an external process.
+// Creating a new surface will automatically re-acquire the display.
+IPC_MESSAGE_CONTROL0(GpuMsg_RelinquishDisplay)

[jbauman, 2014/11/18 00:30:03]

This isn't used in this patch, so remove it.

[GusFernandez, 2014/11/18 15:03:58]

This will be moved to ozone_gpu_messages.cc in the next patch set.

+IPC_MESSAGE_CONTROL0(GpuMsg_DeleteDefaultOffscreenSurface)
+
 //------------------------------------------------------------------------------
 // GPU Host Messages
 // These are messages to the browser.
@@ -402,6 +407,9 @@ IPC_MESSAGE_CONTROL1(GpuHostMsg_DidDestroyOffscreenContext,
 IPC_MESSAGE_CONTROL1(GpuHostMsg_GpuMemoryUmaStats,
                      content::GPUMemoryUmaStats /* GPU memory UMA stats */)
 
+// Response to GpuMsg_RelinquishDisplay
+IPC_MESSAGE_CONTROL0(GpuHostMsg_ResourcesRelinquished)
+
 //------------------------------------------------------------------------------
 // GPU Channel Messages
 // These are messages from a renderer process to the GPU process.