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

gpu/ipc/client/command_buffer_proxy_impl.cc

Index: gpu/ipc/client/command_buffer_proxy_impl.cc
diff --git a/gpu/ipc/client/command_buffer_proxy_impl.cc b/gpu/ipc/client/command_buffer_proxy_impl.cc
index 8775c0abe1bf858b3413fb42cf9f72e19b9d124b..7587212837fdca100c8ab632038e33b45ebce2b4 100644
--- a/gpu/ipc/client/command_buffer_proxy_impl.cc
+++ b/gpu/ipc/client/command_buffer_proxy_impl.cc
@@ -617,23 +617,13 @@
   signal_tasks_.insert(std::make_pair(signal_id, callback));
 }
 
-void CommandBufferProxyImpl::TakeFrontBuffer(const gpu::Mailbox& mailbox) {
-  CheckLock();
-  if (last_state_.error != gpu::error::kNoError)
-    return;
-
-  Send(new GpuCommandBufferMsg_TakeFrontBuffer(route_id_, mailbox));
-}
-
-void CommandBufferProxyImpl::ReturnFrontBuffer(const gpu::Mailbox& mailbox,
-                                               const gpu::SyncToken& sync_token,
-                                               bool is_lost) {
-  CheckLock();
-  if (last_state_.error != gpu::error::kNoError)
-    return;
-
-  Send(new GpuCommandBufferMsg_ReturnFrontBuffer(route_id_, mailbox, sync_token,
-                                                 is_lost));
+bool CommandBufferProxyImpl::ProduceFrontBuffer(const gpu::Mailbox& mailbox) {
+  CheckLock();
+  if (last_state_.error != gpu::error::kNoError)
+    return false;
+
+  Send(new GpuCommandBufferMsg_ProduceFrontBuffer(route_id_, mailbox));
+  return true;
 }
 
 gpu::error::Error CommandBufferProxyImpl::GetLastError() {