Speed up quad deserialization.

cc/quads/largest_draw_quad.cc

Index: cc/quads/largest_draw_quad.cc
diff --git a/cc/quads/largest_draw_quad.cc b/cc/quads/largest_draw_quad.cc
index 35c64314c6d87965e331a478f83e3537f3af7487..76369e4f7913a57cedf39df8680ed07253928126 100644
--- a/cc/quads/largest_draw_quad.cc
+++ b/cc/quads/largest_draw_quad.cc
@@ -19,13 +19,12 @@
 #include "cc/quads/yuv_video_draw_quad.h"
 
 namespace {
-const size_t kLargestDrawQuadSize =
-    sizeof(cc::YUVVideoDrawQuad) + sizeof(gfx::ColorSpace);
+const size_t kLargestDrawQuadSize = sizeof(cc::YUVVideoDrawQuad);
 }  // namespace
 
 namespace cc {
 
-size_t LargestDrawQuadSize() {
+size_t LargestDrawQuadSubclassSize() {
   // Currently the largest quad is either a RenderPassDrawQuad or a
   // StreamVideoDrawQuad depends on hardware structure.
 
@@ -56,4 +55,9 @@ size_t LargestDrawQuadSize() {
   return kLargestDrawQuadSize;
 }
 
+size_t LargestDrawQuadSerializedSize() {
+  return std::max<size_t>(kLargestDrawQuadSize,
+                          sizeof(YUVVideoDrawQuad) + sizeof(gfx::ColorSpace));
+}
+
 }  // namespace cc