Revert of Pepper takes ownership of a mailbox before passing it to the texture layer.

gpu/ipc/common/gpu_messages.h

Index: gpu/ipc/common/gpu_messages.h
diff --git a/gpu/ipc/common/gpu_messages.h b/gpu/ipc/common/gpu_messages.h
index a2cfeff9a45692f4814be669bac84b2ba27e262d..5bb78ed74c366f70a9858bdc2968df337e63acef 100644
--- a/gpu/ipc/common/gpu_messages.h
+++ b/gpu/ipc/common/gpu_messages.h
@@ -137,17 +137,10 @@
 IPC_SYNC_MESSAGE_ROUTED1_0(GpuCommandBufferMsg_SetGetBuffer,
                            int32_t /* shm_id */)
 
-// Takes the front buffer into a mailbox. This allows another context to draw
+// Produces the front buffer into a mailbox. This allows another context to draw
 // the output of this context.
-IPC_MESSAGE_ROUTED1(GpuCommandBufferMsg_TakeFrontBuffer,
+IPC_MESSAGE_ROUTED1(GpuCommandBufferMsg_ProduceFrontBuffer,
                     gpu::Mailbox /* mailbox */)
-
-// Returns a front buffer taken with GpuCommandBufferMsg_TakeFrontBuffer. This
-// allows it to be reused.
-IPC_MESSAGE_ROUTED3(GpuCommandBufferMsg_ReturnFrontBuffer,
-                    gpu::Mailbox /* mailbox */,
-                    gpu::SyncToken /* sync_token */,
-                    bool /* is_lost */)
 
 // Wait until the token is in a specific range, inclusive.
 IPC_SYNC_MESSAGE_ROUTED2_1(GpuCommandBufferMsg_WaitForTokenInRange,