Compositor bindings for mojo html_viewer

This binds mojo's html_viewer to a compositor implementation that uses surfaces
to present. It reuses the bindings for the WebLayer* types in cc/blink and adds
a new implementation of blink::WebLayerTreeView that shares some things with
content/renderer/gpu/render_widget_compositor.cc but is distinct enough to be
its own class. Whenever the compositor resizes (and thus needs a new surface id)
it passes the surface id to the view manager client lib.

This also adds mojo bindings for a few new quad types that are used on the web.
We don't yet have support for video quad types, but we don't have the media
system hooked up to html_viewer yet either so these will not be generated.

Review URL: https://codereview.chromium.org/558343004

Cr-Commit-Position: refs/heads/master@{#294546}

2 files changed, 18 insertions, 2 deletions

diff --git a/mojo/cc/output_surface_mojo.cc b/mojo/cc/output_surface_mojo.cc
index 05c6a84..37a4eb0 100644
--- a/mojo/cc/output_surface_mojo.cc
+++ b/mojo/cc/output_surface_mojo.cc
@@ -12,13 +12,17 @@
 namespace mojo {
 
 OutputSurfaceMojo::OutputSurfaceMojo(
+    OutputSurfaceMojoClient* client,
     const scoped_refptr<cc::ContextProvider>& context_provider,
     SurfacePtr surface,
     uint32_t id_namespace)
     : cc::OutputSurface(context_provider),
+      output_surface_mojo_client_(client),
       surface_(surface.Pass()),
       id_allocator_(id_namespace) {
   surface_.set_client(this);
+  capabilities_.delegated_rendering = true;
+  capabilities_.max_frames_pending = 1;
 }
 
 OutputSurfaceMojo::~OutputSurfaceMojo() {
@@ -37,6 +41,7 @@ void OutputSurfaceMojo::SwapBuffers(cc::CompositorFrame* frame) {
     surface_id_ = id_allocator_.GenerateId();
     surface_->CreateSurface(SurfaceId::From(surface_id_),
                             Size::From(frame_size));
+    output_surface_mojo_client_->DidCreateSurface(surface_id_);
     surface_size_ = frame_size;
   }
 
diff --git a/mojo/cc/output_surface_mojo.h b/mojo/cc/output_surface_mojo.h
index fbde931..f5b98ae 100644
--- a/mojo/cc/output_surface_mojo.h
+++ b/mojo/cc/output_surface_mojo.h
@@ -12,12 +12,19 @@
 
 namespace mojo {
 
+class OutputSurfaceMojoClient {
+ public:
+  virtual ~OutputSurfaceMojoClient() {}
+
+  virtual void DidCreateSurface(cc::SurfaceId id) = 0;
+};
+
 class OutputSurfaceMojo : public cc::OutputSurface, public SurfaceClient {
  public:
-  OutputSurfaceMojo(const scoped_refptr<cc::ContextProvider>& context_provider,
+  OutputSurfaceMojo(OutputSurfaceMojoClient* client,
+                    const scoped_refptr<cc::ContextProvider>& context_provider,
                     SurfacePtr surface,
                     uint32_t id_namespace);
-  virtual ~OutputSurfaceMojo();
 
   // SurfaceClient implementation.
   virtual void ReturnResources(Array<ReturnedResourcePtr> resources) OVERRIDE;
@@ -25,7 +32,11 @@ class OutputSurfaceMojo : public cc::OutputSurface, public SurfaceClient {
   // cc::OutputSurface implementation.
   virtual void SwapBuffers(cc::CompositorFrame* frame) OVERRIDE;
 
+ protected:
+  virtual ~OutputSurfaceMojo();
+
  private:
+  OutputSurfaceMojoClient* output_surface_mojo_client_;
   SurfacePtr surface_;
   cc::SurfaceIdAllocator id_allocator_;
   cc::SurfaceId surface_id_;