Added the Vulkan Context Provider implementation.

content/renderer/render_widget.cc

Index: content/renderer/render_widget.cc
diff --git a/content/renderer/render_widget.cc b/content/renderer/render_widget.cc
index 896f57c81f33599c80e4905bf378c5b4af0a8322..a02082cb476ee069574c8655dd9fc0ef9f617ee6 100644
--- a/content/renderer/render_widget.cc
+++ b/content/renderer/render_widget.cc
@@ -780,13 +780,15 @@ std::unique_ptr<cc::OutputSurface> RenderWidget::CreateOutputSurface(
   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