Implement on demand quad rasterization for PicturePiles.

cc/quads/draw_quad.h

 // Copyright 2012 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_DRAW_QUAD_H_
 #define CC_QUADS_DRAW_QUAD_H_
 
 #include "base/callback.h"
 #include "cc/base/cc_export.h"
 #include "cc/quads/shared_quad_state.h"
 #include "cc/resources/resource_provider.h"
 
 namespace cc {
 
 // DrawQuad is a bag of data used for drawing a quad. Because different
 // materials need different bits of per-quad data to render, classes that derive
 // from DrawQuad store additional data in their derived instance. The Material
 // enum is used to "safely" downcast to the derived class.
 class CC_EXPORT DrawQuad {
  public:
   enum Material {
     INVALID,
     CHECKERBOARD,
     DEBUG_BORDER,
     IO_SURFACE_CONTENT,
+    PICTURE_CONTENT,
     RENDER_PASS,
     TEXTURE_CONTENT,
     SOLID_COLOR,
     TILED_CONTENT,
     YUV_VIDEO_CONTENT,
     STREAM_VIDEO_CONTENT,
   };
 
   virtual ~DrawQuad();
 
@@ skipping 74 matching lines @@
               Material material,
               gfx::Rect rect,
               gfx::Rect opaque_rect,
               gfx::Rect visible_rect,
               bool needs_blending);
 };
 
 }
 
 #endif  // CC_QUADS_DRAW_QUAD_H_