Added the Vulkan Context Provider implementation.

content/renderer/render_widget.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/renderer/render_widget.h"
 
 #include <memory>
 #include <utility>
 
 #include "base/auto_reset.h"
@@ skipping 761 matching lines @@
     if (gpu_channel_host->gpu_info().software_rendering)
       use_software = true;
   }
 
 #if defined(ENABLE_VULKAN)
   scoped_refptr<cc::VulkanContextProvider> vulkan_context_provider;
 #endif
   scoped_refptr<ContextProviderCommandBuffer> context_provider;
   scoped_refptr<ContextProviderCommandBuffer> worker_context_provider;
   if (!use_software) {
 #if defined(ENABLE_VULKAN)

[piman, 2016/04/19 23:42:02]

I think you don't need this ifdef any more.

-    vulkan_context_provider = cc::VulkanInProcessContextProvider::Create();
-    if (vulkan_context_provider) {
-      uint32_t output_surface_id = next_output_surface_id_++;
-      return base::WrapUnique(new DelegatedCompositorOutputSurface(
-          routing_id(), output_surface_id, context_provider,
-          worker_context_provider, vulkan_context_provider,
-          frame_swap_message_queue_));
+    if (command_line.HasSwitch(switches::kEnableVulkan)) {
+      vulkan_context_provider = cc::VulkanInProcessContextProvider::Create();
+      if (vulkan_context_provider) {
+        uint32_t output_surface_id = next_output_surface_id_++;
+        return base::WrapUnique(new DelegatedCompositorOutputSurface(
+            routing_id(), output_surface_id, context_provider,
+            worker_context_provider, vulkan_context_provider,
+            frame_swap_message_queue_));
+      }
     }
 #endif
 
     context_provider = new ContextProviderCommandBuffer(
         CreateOffscreenContext(std::move(gpu_channel_host),
                                GetURLForGraphicsContext3D()),
         RENDER_COMPOSITOR_CONTEXT);
     worker_context_provider =
         RenderThreadImpl::current()->SharedWorkerContextProvider();
     if (!worker_context_provider) {
@@ skipping 1326 matching lines @@
 }
 
 float RenderWidget::GetOriginalDeviceScaleFactor() const {
   return
       screen_metrics_emulator_ ?
       screen_metrics_emulator_->original_screen_info().deviceScaleFactor :
       device_scale_factor_;
 }
 
 }  // namespace content