Mojo multiple command buffer support and sample

mojo/examples/surfaces_app/child_gl_app.cc

Index: mojo/examples/surfaces_app/child_gl_app.cc
diff --git a/mojo/examples/surfaces_app/child_app.cc b/mojo/examples/surfaces_app/child_gl_app.cc
similarity index 61%
copy from mojo/examples/surfaces_app/child_app.cc
copy to mojo/examples/surfaces_app/child_gl_app.cc
index 215f496caec51e7d54ec69106e69e5013c278de3..ae6ca0c4d78519bcb1628571ee433e59c3ec583e 100644
--- a/mojo/examples/surfaces_app/child_app.cc
+++ b/mojo/examples/surfaces_app/child_gl_app.cc
@@ -2,23 +2,27 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "mojo/examples/surfaces_app/child_impl.h"
+#include "base/threading/platform_thread.h"
+#include "mojo/examples/surfaces_app/child_gl_impl.h"
 #include "mojo/public/cpp/application/application_connection.h"
 #include "mojo/public/cpp/application/application_delegate.h"
 #include "mojo/public/cpp/application/application_impl.h"
 #include "mojo/public/cpp/bindings/string.h"
+#include "mojo/services/public/interfaces/gpu/gpu.mojom.h"
 
 namespace mojo {
 namespace examples {
 
-class ChildApp : public ApplicationDelegate, public InterfaceFactory<Child> {
+class ChildGLApp : public ApplicationDelegate, public InterfaceFactory<Child> {
  public:
-  ChildApp() {}
-  virtual ~ChildApp() {}
+  ChildGLApp() {}
+  virtual ~ChildGLApp() {}
 
   virtual void Initialize(ApplicationImpl* app) OVERRIDE {
     surfaces_service_connection_ =
         app->ConnectToApplication("mojo:mojo_surfaces_service");
+    // TODO(jamesr): Should be mojo:mojo_gpu_service
+    app->ConnectToService("mojo:mojo_native_viewport_service", &gpu_service_);
   }
 
   // ApplicationDelegate implementation.
@@ -31,20 +35,25 @@ class ChildApp : public ApplicationDelegate, public InterfaceFactory<Child> {
   // InterfaceFactory<Child> implementation.
   virtual void Create(ApplicationConnection* connection,
                       InterfaceRequest<Child> request) OVERRIDE {
-    BindToRequest(new ChildImpl(surfaces_service_connection_), &request);
+    CommandBufferPtr command_buffer;
+    gpu_service_->CreateOffscreenGLES2Context(Get(&command_buffer));
+    BindToRequest(
+        new ChildGLImpl(surfaces_service_connection_, command_buffer.Pass()),
+        &request);
   }
 
  private:
   ApplicationConnection* surfaces_service_connection_;
+  GpuPtr gpu_service_;
 
-  DISALLOW_COPY_AND_ASSIGN(ChildApp);
+  DISALLOW_COPY_AND_ASSIGN(ChildGLApp);
 };
 
 }  // namespace examples
 
 // static
 ApplicationDelegate* ApplicationDelegate::Create() {
-  return new examples::ChildApp();
+  return new examples::ChildGLApp();
 }
 
 }  // namespace mojo