Remove redundant codepath for webgl api blocking

gpu/ipc/service/gpu_channel_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/ipc/service/gpu_channel_manager.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 44 matching lines @@
       delegate_(delegate),
       watchdog_(watchdog),
       shutdown_event_(shutdown_event),
       share_group_(new gfx::GLShareGroup),
       mailbox_manager_(gles2::MailboxManager::Create(gpu_preferences)),
       gpu_memory_manager_(this),
       sync_point_manager_(sync_point_manager),
       sync_point_client_waiter_(
           sync_point_manager->CreateSyncPointClientWaiter()),
       gpu_memory_buffer_factory_(gpu_memory_buffer_factory),
+      exiting_for_lost_context_(false),
       weak_factory_(this) {
   DCHECK(task_runner);
   DCHECK(io_task_runner);
   if (gpu_preferences_.ui_prioritize_in_gpu_process)
     preemption_flag_ = new PreemptionFlag;
 }
 
 GpuChannelManager::~GpuChannelManager() {
   // Destroy channels before anything else because of dependencies.
   gpu_channels_.clear();
@@ skipping 165 matching lines @@
 
 void GpuChannelManager::LoseAllContexts() {
   for (auto& kv : gpu_channels_) {
     kv.second->MarkAllContextsLost();
   }
   task_runner_->PostTask(FROM_HERE,
                          base::Bind(&GpuChannelManager::DestroyAllChannels,
                                     weak_factory_.GetWeakPtr()));
 }
 
+void GpuChannelManager::MaybeExitOnContextLost() {
+  if (!gpu_preferences().single_process && !gpu_preferences().in_process_gpu) {
+    LOG(ERROR) << "Exiting GPU process because some drivers cannot recover"
+               << " from problems.";
+    // Signal the message loop to quit to shut down other threads
+    // gracefully.
+    base::MessageLoop::current()->QuitNow();
+    exiting_for_lost_context_ = true;
+  }
+}
+
 void GpuChannelManager::DestroyAllChannels() {
   gpu_channels_.clear();
 }
 
 gfx::GLSurface* GpuChannelManager::GetDefaultOffscreenSurface() {
   if (!default_offscreen_surface_.get()) {
     default_offscreen_surface_ =
         gfx::GLSurface::CreateOffscreenGLSurface(gfx::Size());
   }
   return default_offscreen_surface_.get();
@@ skipping 40 matching lines @@
     }
   }
   if (!stub || !stub->decoder()->MakeCurrent())
     return;
   glFinish();
   DidAccessGpu();
 }
 #endif
 
 }  // namespace gpu