Update from https://crrev.com/304121

gpu/command_buffer/tests/gl_manager.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "gpu/command_buffer/tests/gl_manager.h"
 
 #include <GLES2/gl2.h>
 #include <GLES2/gl2ext.h>
 #include <GLES2/gl2extchromium.h>
 
@@ skipping 305 matching lines @@
     decoder_->Destroy(true);
     decoder_.reset();
   }
 }
 
 const gpu::gles2::FeatureInfo::Workarounds& GLManager::workarounds() const {
   return decoder_->GetContextGroup()->feature_info()->workarounds();
 }
 
 void GLManager::PumpCommands() {
-  decoder_->MakeCurrent();
+  if (!decoder_->MakeCurrent()) {
+    command_buffer_->SetContextLostReason(decoder_->GetContextLostReason());
+    command_buffer_->SetParseError(::gpu::error::kLostContext);
+    return;
+  }
   gpu_scheduler_->PutChanged();
   ::gpu::CommandBuffer::State state = command_buffer_->GetLastState();
   if (!context_lost_allowed_) {
     ASSERT_EQ(::gpu::error::kNoError, state.error);
   }
 }
 
 bool GLManager::GetBufferChanged(int32 transfer_buffer_id) {
   return gpu_scheduler_->SetGetBuffer(transfer_buffer_id);
 }
@@ skipping 68 matching lines @@
 void GLManager::SetSurfaceVisible(bool visible) {
   NOTIMPLEMENTED();
 }
 
 uint32 GLManager::CreateStreamTexture(uint32 texture_id) {
   NOTIMPLEMENTED();
   return 0;
 }
 
 }  // namespace gpu