Implement on demand quad rasterization for PicturePiles.

cc/tile_draw_quad.cc

Index: cc/tile_draw_quad.cc
diff --git a/cc/tile_draw_quad.cc b/cc/tile_draw_quad.cc
index 13b1d33622498204bffee0524335847042ecb4aa..e9a2398852d640a5f0416325176dc4e2a7ac1213 100644
--- a/cc/tile_draw_quad.cc
+++ b/cc/tile_draw_quad.cc
@@ -27,7 +27,7 @@ void TileDrawQuad::SetNew(const SharedQuadState* shared_quad_state,
                           bool swizzle_contents) {
   gfx::Rect visible_rect = rect;
   bool needs_blending = false;
-  DrawQuad::SetAll(shared_quad_state, DrawQuad::TILED_CONTENT, rect,
+  DrawQuad::SetAll(shared_quad_state, material(), rect,
                    opaque_rect, visible_rect, needs_blending);
   this->resource_id = resource_id;
   this->tex_coord_rect = tex_coord_rect;
@@ -44,7 +44,7 @@ void TileDrawQuad::SetAll(const SharedQuadState* shared_quad_state,
                           const gfx::RectF& tex_coord_rect,
                           gfx::Size texture_size,
                           bool swizzle_contents) {
-  DrawQuad::SetAll(shared_quad_state, DrawQuad::TILED_CONTENT, rect,
+  DrawQuad::SetAll(shared_quad_state, material(), rect,
                    opaque_rect, visible_rect, needs_blending);
   this->resource_id = resource_id;
   this->tex_coord_rect = tex_coord_rect;
@@ -52,6 +52,14 @@ void TileDrawQuad::SetAll(const SharedQuadState* shared_quad_state,
   this->swizzle_contents = swizzle_contents;
 }
 
+bool TileDrawQuad::IsPictureQuad() const {

[danakj, 2013/03/14 18:00:56]

this is redundant with the quad's |material| field.

[Leandro Graciá Gil, 2013/03/19 17:30:07]

Removed.

+  return false;
+}
+
+DrawQuad::Material TileDrawQuad::material() const {
+  return DrawQuad::TILED_CONTENT;
+}
+
 void TileDrawQuad::IterateResources(
     const ResourceIteratorCallback& callback) {
   resource_id = callback.Run(resource_id);