cc: Cleanup class/struct forward declarations

cc/output/geometry_binding.h

Index: cc/output/geometry_binding.h
diff --git a/cc/output/geometry_binding.h b/cc/output/geometry_binding.h
index 473421640f5d41c6cc7cd387b5603b86b87bc73b..0019013428bb74934dd06dbd1d011d384d0822fa 100644
--- a/cc/output/geometry_binding.h
+++ b/cc/output/geometry_binding.h
@@ -12,13 +12,6 @@
 #include "third_party/khronos/GLES2/gl2ext.h"
 #include "ui/gfx/geometry/rect_f.h"
 
-namespace gfx {
-class QuadF;
-class Quad;
-class QuadIndex;
-class PointF;
-}
-
 namespace cc {
 
 struct GeometryBindingVertex {
@@ -49,9 +42,6 @@ struct GeometryBindingQuadIndex {
   uint16_t data[6];
 };
 
-class DrawQuad;
-class DrawPolygon;
-
 struct GeometryBinding {
   // All layer shaders share the same attribute locations for the vertex
   // positions and texture coordinates. This allows switching shaders without