Use RenderPass to create DrawQuad in unittests

cc/quads/render_pass.h

Index: cc/quads/render_pass.h
diff --git a/cc/quads/render_pass.h b/cc/quads/render_pass.h
index ce5a90e514d8772695c0be2d91203adfa0665795..6b68f8d910b4c4065ef3d53bd1e45ce0be6cf843 100644
--- a/cc/quads/render_pass.h
+++ b/cc/quads/render_pass.h
@@ -24,6 +24,7 @@ class Value;
 namespace cc {
 
 class DrawQuad;
+class RenderPassDrawQuad;
 class CopyOutputRequest;
 class SharedQuadState;
 
@@ -96,6 +97,13 @@ class CC_EXPORT RenderPass {
     return static_cast<DrawQuadType*>(quad_list.back());
   }
 
+  RenderPassDrawQuad* CopyFromAndAppendRenderPassDrawQuad(
+      const RenderPassDrawQuad* quad,
+      const SharedQuadState* shared_quad_state,
+      RenderPass::Id render_pass_id);
+  DrawQuad* CopyFromAndAppendDrawQuad(const DrawQuad* quad,
+                                      const SharedQuadState* shared_quad_state);
+
   // Uniquely identifies the render pass in the compositor's current frame.
   Id id;
 
@@ -124,6 +132,14 @@ class CC_EXPORT RenderPass {
   RenderPass();
 
  private:
+  template <typename DrawQuadType>
+  DrawQuadType* CopyFromAndAppendTypedDrawQuad(const DrawQuad* quad) {
+    scoped_ptr<DrawQuadType> draw_quad =
+        make_scoped_ptr(new DrawQuadType(*DrawQuadType::MaterialCast(quad)));
+    quad_list.push_back(draw_quad.template PassAs<DrawQuad>());
+    return static_cast<DrawQuadType*>(quad_list.back());
+  }
+
   DISALLOW_COPY_AND_ASSIGN(RenderPass);
 };