Use RenderPass to create DrawQuad in unittests

cc/quads/render_pass.h

 // Copyright 2011 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.
 
 #ifndef CC_QUADS_RENDER_PASS_H_
 #define CC_QUADS_RENDER_PASS_H_
 
 #include <utility>
 
 #include "base/basictypes.h"
@@ skipping 77 matching lines @@
 
   scoped_ptr<base::Value> AsValue() const;
 
   SharedQuadState* CreateAndAppendSharedQuadState();
   template <typename DrawQuadType>
   DrawQuadType* CreateAndAppendDrawQuad() {
     scoped_ptr<DrawQuadType> draw_quad = DrawQuadType::Create();
     quad_list.push_back(draw_quad.template PassAs<DrawQuad>());
     return static_cast<DrawQuadType*>(quad_list.back());
   }
+  template <typename DrawQuadType>
+  DrawQuadType* CopyFromAndAppendDrawQuad(const DrawQuadType* quad) {

[danakj, 2014/07/07 22:30:15]

Can we do two methods:

1. that takes DrawQuad* and SQS* and does DrawQuad::Copy.
2. that takes RPDrawQuad* and SQS* and RPId and does RPDrawQuad::Copy.

and then we can make those methods not allocate either now or later.

[weiliangc, 2014/07/08 21:54:38]

Done.

+    scoped_ptr<DrawQuadType> draw_quad =
+        make_scoped_ptr(new DrawQuadType(*quad));
+    quad_list.push_back(draw_quad.template PassAs<DrawQuad>());
+    return static_cast<DrawQuadType*>(quad_list.back());
+  }
 
   // Uniquely identifies the render pass in the compositor's current frame.
   Id id;
 
   // These are in the space of the render pass' physical pixels.
   gfx::Rect output_rect;
   gfx::Rect damage_rect;
 
   // Transforms from the origin of the |output_rect| to the origin of the root
   // render pass' |output_rect|.
@@ skipping 37 matching lines @@
 #error define a hash function for your compiler
 #endif  // COMPILER
 }  // namespace BASE_HASH_NAMESPACE
 
 namespace cc {
 typedef ScopedPtrVector<RenderPass> RenderPassList;
 typedef base::hash_map<RenderPass::Id, RenderPass*> RenderPassIdHashMap;
 }  // namespace cc
 
 #endif  // CC_QUADS_RENDER_PASS_H_