Implement on demand quad rasterization for PicturePiles.

cc/quads/tile_draw_quad.cc

Index: cc/quads/tile_draw_quad.cc
diff --git a/cc/quads/tile_draw_quad.cc b/cc/quads/tile_draw_quad.cc
index 04c473834cba42f72d7d85e6221f832182948551..19f6592ed50e4d9b5f4fa1a337f1922a22365aad 100644
--- a/cc/quads/tile_draw_quad.cc
+++ b/cc/quads/tile_draw_quad.cc
@@ -10,8 +10,10 @@
 namespace cc {
 
 TileDrawQuad::TileDrawQuad()
-    : resource_id(0),
-      swizzle_contents(false) {
+    : resource_id(0) {
+}
+
+TileDrawQuad::~TileDrawQuad() {
 }
 
 scoped_ptr<TileDrawQuad> TileDrawQuad::Create() {
@@ -19,37 +21,31 @@ scoped_ptr<TileDrawQuad> TileDrawQuad::Create() {
 }
 
 void TileDrawQuad::SetNew(const SharedQuadState* shared_quad_state,
-                          gfx::Rect rect,
-                          gfx::Rect opaque_rect,
+                          const gfx::Rect& rect,
+                          const gfx::Rect& opaque_rect,
                           unsigned resource_id,
                           const gfx::RectF& tex_coord_rect,
-                          gfx::Size texture_size,
+                          const gfx::Size& texture_size,
                           bool swizzle_contents) {
-  gfx::Rect visible_rect = rect;
-  bool needs_blending = false;
-  DrawQuad::SetAll(shared_quad_state, DrawQuad::TILED_CONTENT, rect,
-                   opaque_rect, visible_rect, needs_blending);
+  TileDrawQuadBase::SetNew(shared_quad_state, DrawQuad::TILED_CONTENT, rect,
+                           opaque_rect, tex_coord_rect, texture_size,
+                           swizzle_contents);
   this->resource_id = resource_id;
-  this->tex_coord_rect = tex_coord_rect;
-  this->texture_size = texture_size;
-  this->swizzle_contents = swizzle_contents;
 }
 
 void TileDrawQuad::SetAll(const SharedQuadState* shared_quad_state,
-                          gfx::Rect rect,
-                          gfx::Rect opaque_rect,
-                          gfx::Rect visible_rect,
+                          const gfx::Rect& rect,
+                          const gfx::Rect& opaque_rect,
+                          const gfx::Rect& visible_rect,
                           bool needs_blending,
                           unsigned resource_id,
                           const gfx::RectF& tex_coord_rect,
-                          gfx::Size texture_size,
+                          const gfx::Size& texture_size,
                           bool swizzle_contents) {
-  DrawQuad::SetAll(shared_quad_state, DrawQuad::TILED_CONTENT, rect,
-                   opaque_rect, visible_rect, needs_blending);
+  TileDrawQuadBase::SetAll(shared_quad_state, DrawQuad::TILED_CONTENT, rect,
+                           opaque_rect, visible_rect, needs_blending,
+                           tex_coord_rect, texture_size, swizzle_contents);
   this->resource_id = resource_id;
-  this->tex_coord_rect = tex_coord_rect;
-  this->texture_size = texture_size;
-  this->swizzle_contents = swizzle_contents;
 }
 
 void TileDrawQuad::IterateResources(
@@ -57,8 +53,7 @@ void TileDrawQuad::IterateResources(
   resource_id = callback.Run(resource_id);
 }
 
-const TileDrawQuad* TileDrawQuad::MaterialCast(
-    const DrawQuad* quad) {
+const TileDrawQuad* TileDrawQuad::MaterialCast(const DrawQuad* quad) {
   DCHECK(quad->material == DrawQuad::TILED_CONTENT);
   return static_cast<const TileDrawQuad*>(quad);
 }