Added the Vulkan Context Provider implementation.

content/browser/compositor/browser_compositor_output_surface.cc

Index: content/browser/compositor/browser_compositor_output_surface.cc
diff --git a/content/browser/compositor/browser_compositor_output_surface.cc b/content/browser/compositor/browser_compositor_output_surface.cc
index bfcebe445365ecf86394e325b303bffb364379f5..fb70cb7649d2424c724df355b55baa5ddc5f8445 100644
--- a/content/browser/compositor/browser_compositor_output_surface.cc
+++ b/content/browser/compositor/browser_compositor_output_surface.cc
@@ -54,6 +54,15 @@ BrowserCompositorOutputSurface::BrowserCompositorOutputSurface(
   Initialize();
 }
 
+BrowserCompositorOutputSurface::BrowserCompositorOutputSurface(
+    const scoped_refptr<cc::VulkanContextProvider>& vulkan_context_provider,
+    const scoped_refptr<ui::CompositorVSyncManager>& vsync_manager)
+    : OutputSurface(nullptr, nullptr, vulkan_context_provider, nullptr),
+      vsync_manager_(vsync_manager),
+      reflector_(nullptr) {
+  Initialize();
+}
+
 BrowserCompositorOutputSurface::~BrowserCompositorOutputSurface() {
   if (reflector_)
     reflector_->DetachFromOutputSurface();