Added the Vulkan Context Provider implementation.

content/renderer/gpu/delegated_compositor_output_surface.cc

Index: content/renderer/gpu/delegated_compositor_output_surface.cc
diff --git a/content/renderer/gpu/delegated_compositor_output_surface.cc b/content/renderer/gpu/delegated_compositor_output_surface.cc
index b346e4d84b2e20cc2d71f520ae6ab0722fd3eb3d..97d838ead7ea6fe8aa2315f279293b41f1aa34aa 100644
--- a/content/renderer/gpu/delegated_compositor_output_surface.cc
+++ b/content/renderer/gpu/delegated_compositor_output_surface.cc
@@ -12,17 +12,13 @@ DelegatedCompositorOutputSurface::DelegatedCompositorOutputSurface(
     uint32_t output_surface_id,
     const scoped_refptr<ContextProviderCommandBuffer>& context_provider,
     const scoped_refptr<ContextProviderCommandBuffer>& worker_context_provider,
-#if defined(ENABLE_VULKAN)
     const scoped_refptr<cc::VulkanContextProvider>& vulkan_context_provider,
-#endif
     scoped_refptr<FrameSwapMessageQueue> swap_frame_message_queue)
     : CompositorOutputSurface(routing_id,
                               output_surface_id,
                               context_provider,
                               worker_context_provider,
-#if defined(ENABLE_VULKAN)
                               vulkan_context_provider,
-#endif
                               std::unique_ptr<cc::SoftwareOutputDevice>(),
                               swap_frame_message_queue,
                               true) {