Attach flag to use virtual context for WebGraphicsContext3D

content/common/gpu/gpu_command_buffer_stub.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 "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/hash.h"
 #include "base/shared_memory.h"
@@ skipping 93 matching lines @@
     gpu::gles2::ImageManager* image_manager,
     const gfx::Size& size,
     const gpu::gles2::DisallowedFeatures& disallowed_features,
     const std::string& allowed_extensions,
     const std::vector<int32>& attribs,
     gfx::GpuPreference gpu_preference,
     int32 route_id,
     int32 surface_id,
     GpuWatchdog* watchdog,
     bool software,
+    bool use_virtual_gl_context,
     const GURL& active_url)
     : channel_(channel),
       handle_(handle),
       initial_size_(size),
       disallowed_features_(disallowed_features),
       allowed_extensions_(allowed_extensions),
       requested_attribs_(attribs),
       gpu_preference_(gpu_preference),
       route_id_(route_id),
       surface_id_(surface_id),
       software_(software),
+      use_virtual_gl_context_(use_virtual_gl_context),
       last_flush_count_(0),
       last_memory_allocation_valid_(false),
       parent_stub_for_initialization_(),
       parent_texture_for_initialization_(0),
       watchdog_(watchdog),
       sync_point_wait_count_(0),
       delayed_work_scheduled_(false),
       previous_messages_processed_(0),
       active_url_(active_url),
       total_gpu_memory_(0) {
@@ skipping 293 matching lines @@
     surface_ = manager->GetDefaultOffscreenSurface();
   }
 
   if (!surface_.get()) {
     DLOG(ERROR) << "Failed to create surface.\n";
     OnInitializeFailed(reply_message);
     return;
   }
 
   scoped_refptr<gfx::GLContext> context;
-  if (CommandLine::ForCurrentProcess()->HasSwitch(
-      switches::kEnableVirtualGLContexts) && channel_->share_group()) {
+  if ((CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kEnableVirtualGLContexts) || use_virtual_gl_context_) &&
+      channel_->share_group()) {
     context = channel_->share_group()->GetSharedContext();
     if (!context) {
       context = gfx::GLContext::CreateGLContext(
           channel_->share_group(),
           channel_->gpu_channel_manager()->GetDefaultOffscreenSurface(),
           gpu_preference_);
       channel_->share_group()->SetSharedContext(context);
     }
     // This should be a non-virtual GL context.
     DCHECK(context->GetHandle());
@@ skipping 473 matching lines @@
     if (surface_ && MakeCurrent())
       surface_->SetFrontbufferAllocation(
           allocation.browser_allocation.suggest_have_frontbuffer);
   }
 
   last_memory_allocation_valid_ = true;
   last_memory_allocation_ = allocation;
 }
 
 }  // namespace content