Make DrawQuad constructors public, rm DQ::Create() function

mojo/examples/surfaces_app/child_impl.cc

 // Copyright 2014 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 "mojo/examples/surfaces_app/child_impl.h"
 
 #include "base/bind.h"
 #include "cc/output/compositor_frame.h"
 #include "cc/output/delegated_frame_data.h"
 #include "cc/quads/render_pass.h"
@@ skipping 67 matching lines @@
   id_ = allocator_->GenerateId();
   surface_->CreateSurface(mojo::surfaces::SurfaceId::From(id_),
                           mojo::Size::From(size_));
   gfx::Rect rect(size_);
   RenderPass::Id id(1, 1);
   scoped_ptr<RenderPass> pass = RenderPass::Create();
   pass->SetNew(id, rect, rect, gfx::Transform());
 
   CreateAndAppendSimpleSharedQuadState(pass.get(), gfx::Transform(), size_);
 
-  scoped_ptr<SolidColorDrawQuad> color_quad = SolidColorDrawQuad::Create();
+  SolidColorDrawQuad* color_quad =
+      pass->CreateAndAppendDrawQuad<SolidColorDrawQuad>();
   bool force_anti_aliasing_off = false;
   color_quad->SetNew(pass->shared_quad_state_list.back(),
                      rect,
                      rect,
                      color_,
                      force_anti_aliasing_off);
-  pass->quad_list.push_back(color_quad.PassAs<DrawQuad>());
 
   scoped_ptr<DelegatedFrameData> delegated_frame_data(new DelegatedFrameData);
   delegated_frame_data->render_pass_list.push_back(pass.Pass());
 
   scoped_ptr<CompositorFrame> frame(new CompositorFrame);
   frame->delegated_frame_data = delegated_frame_data.Pass();
 
   surface_->SubmitFrame(mojo::surfaces::SurfaceId::From(id_),
                         mojo::surfaces::Frame::From(*frame));
   produce_callback_.Run(surfaces::SurfaceId::From(id_));
 }
 
 }  // namespace examples
 }  // namespace mojo