Add a simple browser UI (with url bar)

mandoline/ui/aura/surface_context_factory.cc

 // Copyright 2015 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 "mandoline/ui/aura/surface_context_factory.h"
 
 #include "cc/output/output_surface.h"
 #include "cc/resources/shared_bitmap_manager.h"
 #include "cc/surfaces/surface_id_allocator.h"
 #include "components/view_manager/public/cpp/view.h"
@@ skipping 10 matching lines @@
   ~FakeReflector() override {}
   void OnMirroringCompositorResized() override {}
   void AddMirroringLayer(ui::Layer* layer) override {}
   void RemoveMirroringLayer(ui::Layer* layer) override {}
 };
 
 }
 
 SurfaceContextFactory::SurfaceContextFactory(mojo::Shell* shell,
                                              mojo::View* view)
-    : surface_binding_(shell, view) {
+    : surface_binding_(shell, view),
+      next_surface_id_namespace_(1u) {
 }
 
 SurfaceContextFactory::~SurfaceContextFactory() {
 }
 
 void SurfaceContextFactory::CreateOutputSurface(
     base::WeakPtr<ui::Compositor> compositor) {
   NOTIMPLEMENTED();
   compositor->SetOutputSurface(surface_binding_.CreateOutputSurface());
 }
@@ skipping 39 matching lines @@
   return nullptr;
 }
 
 cc::TaskGraphRunner* SurfaceContextFactory::GetTaskGraphRunner() {
   NOTIMPLEMENTED();
   return nullptr;
 }
 
 scoped_ptr<cc::SurfaceIdAllocator>
 SurfaceContextFactory::CreateSurfaceIdAllocator() {
-  NOTIMPLEMENTED();
-  return nullptr;
+  return make_scoped_ptr(
+      new cc::SurfaceIdAllocator(next_surface_id_namespace_++));
 }
 
 void SurfaceContextFactory::ResizeDisplay(ui::Compositor* compositor,
                                           const gfx::Size& size) {
   NOTIMPLEMENTED();
 }
 
 }  // namespace mandoline