Revert of Make lost context and error message callbacks on GpuControl go to client

mojo/gles2/command_buffer_client_impl.cc

Index: mojo/gles2/command_buffer_client_impl.cc
diff --git a/mojo/gles2/command_buffer_client_impl.cc b/mojo/gles2/command_buffer_client_impl.cc
index e32a2146cccd3469697c312ebd68360ff2e4256e..14f0569ce1495c1f9ae994a8fdec6660abf305d6 100644
--- a/mojo/gles2/command_buffer_client_impl.cc
+++ b/mojo/gles2/command_buffer_client_impl.cc
@@ -16,7 +16,6 @@
 #include "components/mus/gles2/command_buffer_type_conversions.h"
 #include "components/mus/gles2/mojo_buffer_backing.h"
 #include "components/mus/gles2/mojo_gpu_memory_buffer.h"
-#include "gpu/command_buffer/client/gpu_control_client.h"
 #include "gpu/command_buffer/common/command_buffer_id.h"
 #include "gpu/command_buffer/common/gpu_memory_buffer_support.h"
 #include "gpu/command_buffer/common/sync_token.h"
@@ -62,11 +61,15 @@
 
 }  // namespace
 
+CommandBufferDelegate::~CommandBufferDelegate() {}
+
+void CommandBufferDelegate::ContextLost() {}
+
 CommandBufferClientImpl::CommandBufferClientImpl(
+    CommandBufferDelegate* delegate,
     const std::vector<int32_t>& attribs,
     mojo::ScopedMessagePipeHandle command_buffer_handle)
-    : gpu_control_client_(nullptr),
-      destroyed_(false),
+    : delegate_(delegate),
       attribs_(attribs),
       client_binding_(this),
       command_buffer_id_(),
@@ -200,10 +203,6 @@
   command_buffer_->DestroyTransferBuffer(id);
 }
 
-void CommandBufferClientImpl::SetGpuControlClient(gpu::GpuControlClient* c) {
-  gpu_control_client_ = c;
-}
-
 gpu::Capabilities CommandBufferClientImpl::GetCapabilities() {
   return capabilities_;
 }
@@ -286,14 +285,10 @@
 }
 
 void CommandBufferClientImpl::Destroyed(int32_t lost_reason, int32_t error) {
-  if (destroyed_)
-    return;
   last_state_.context_lost_reason =
       static_cast<gpu::error::ContextLostReason>(lost_reason);
   last_state_.error = static_cast<gpu::error::Error>(error);
-  if (gpu_control_client_)
-    gpu_control_client_->OnGpuControlLostContext();
-  destroyed_ = true;
+  delegate_->ContextLost();
 }
 
 void CommandBufferClientImpl::SignalAck(uint32_t id) {