Mojo multiple command buffer support and sample

mojo/examples/surfaces_app/surfaces_app.cc

Index: mojo/examples/surfaces_app/surfaces_app.cc
diff --git a/mojo/examples/surfaces_app/surfaces_app.cc b/mojo/examples/surfaces_app/surfaces_app.cc
index 6b7a9e94194a6675d672f2343c67698a8e6c3a92..b5d83cf0852272b994a7f23582e99edbcb133fdb 100644
--- a/mojo/examples/surfaces_app/surfaces_app.cc
+++ b/mojo/examples/surfaces_app/surfaces_app.cc
@@ -44,7 +44,8 @@ class SurfacesApp : public ApplicationDelegate,
 
     child_size_ = gfx::Size(size_.width() / 3, size_.height() / 2);
     connection->ConnectToService("mojo:mojo_surfaces_child_app", &child_one_);
-    connection->ConnectToService("mojo:mojo_surfaces_child_app", &child_two_);
+    connection->ConnectToService("mojo:mojo_surfaces_child_gl_app",
+                                 &child_two_);
     child_one_->ProduceFrame(Color::From(SK_ColorBLUE),
                              Size::From(child_size_),
                              base::Bind(&SurfacesApp::ChildOneProducedFrame,
@@ -59,15 +60,15 @@ class SurfacesApp : public ApplicationDelegate,
 
   void ChildOneProducedFrame(SurfaceIdPtr id) {
     child_one_id_ = id.To<cc::SurfaceId>();
-    Draw(45.0);
+    Draw(10);
   }
 
   void ChildTwoProducedFrame(SurfaceIdPtr id) {
     child_two_id_ = id.To<cc::SurfaceId>();
-    Draw(45.0);
+    Draw(10);
   }
 
-  void Draw(double rotation_degrees) {
+  void Draw(int offset) {
     if (onscreen_id_.is_null()) {
       onscreen_id_ = allocator_->GenerateId();
       CommandBufferPtr cb;
@@ -80,19 +81,22 @@ class SurfacesApp : public ApplicationDelegate,
     }
     if (child_one_id_.is_null() || child_two_id_.is_null())
       return;
+    int bounced_offset = offset;
+    if (offset > 200)
+      bounced_offset = 400 - offset;
     embedder_->ProduceFrame(
-        child_one_id_, child_two_id_, child_size_, size_, rotation_degrees);
+        child_one_id_, child_two_id_, child_size_, size_, bounced_offset);
     base::MessageLoop::current()->PostDelayedTask(
         FROM_HERE,
         base::Bind(
-            &SurfacesApp::Draw, base::Unretained(this), rotation_degrees + 2.0),
-        base::TimeDelta::FromMilliseconds(17));
+            &SurfacesApp::Draw, base::Unretained(this), (offset + 2) % 400),
+        base::TimeDelta::FromMilliseconds(50));
   }
 
   // SurfaceClient implementation.
   virtual void SetIdNamespace(uint32_t id_namespace) OVERRIDE {
     allocator_.reset(new cc::SurfaceIdAllocator(id_namespace));
-    Draw(45.0);
+    Draw(10);
   }
   virtual void ReturnResources(
       Array<ReturnedResourcePtr> resources) OVERRIDE {