Remove WebGraphicsContext3DCommandBufferImpl::IsCommandBufferContextLost

content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.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 "content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.h"
 
 #include "third_party/khronos/GLES2/gl2.h"
 #ifndef GL_GLEXT_PROTOTYPES
 #define GL_GLEXT_PROTOTYPES 1
 #endif
@@ skipping 299 matching lines @@
   command_buffer_.reset();
 
   host_ = nullptr;
 }
 
 gpu::ContextSupport*
 WebGraphicsContext3DCommandBufferImpl::GetContextSupport() {
   return real_gl_.get();
 }
 
-bool WebGraphicsContext3DCommandBufferImpl::IsCommandBufferContextLost() {
-  // If the channel shut down unexpectedly, let that supersede the
-  // command buffer's state.
-  if (host_.get() && host_->IsLost())
-    return true;
-  gpu::CommandBuffer::State state = command_buffer_->GetLastState();
-  return gpu::error::IsError(state.error);
-}
-
 // static
 WebGraphicsContext3DCommandBufferImpl*
 WebGraphicsContext3DCommandBufferImpl::CreateOffscreenContext(
     gpu::GpuChannelHost* host,
     const gpu::gles2::ContextCreationAttribHelper& attributes,
     gfx::GpuPreference gpu_preference,
     bool share_resources,
     bool automatic_flushes,
     const GURL& active_url,
     const SharedMemoryLimits& limits,
     WebGraphicsContext3DCommandBufferImpl* share_context) {
-  if (!host)
-    return NULL;
-
-  if (share_context && share_context->IsCommandBufferContextLost())
-    return NULL;
-
+  DCHECK(host);
   return new WebGraphicsContext3DCommandBufferImpl(
       gpu::kNullSurfaceHandle, active_url, host, attributes, gpu_preference,
       share_resources, automatic_flushes, limits, share_context);
 }
 
 void WebGraphicsContext3DCommandBufferImpl::OnContextLost() {
   if (context_lost_callback_)
     context_lost_callback_->onContextLost();
 
   share_group_->RemoveAllContexts();
@@ skipping 10 matching lines @@
 
 void WebGraphicsContext3DCommandBufferImpl::OnErrorMessage(const char* message,
                                                            int id) {
   if (error_message_callback_) {
     blink::WebString str = blink::WebString::fromUTF8(message);
     error_message_callback_->onErrorMessage(str, id);
   }
 }
 
 }  // namespace content