Adding support for per vertex opacity on textured layer

cc/texture_draw_quad.h

Index: cc/texture_draw_quad.h
diff --git a/cc/texture_draw_quad.h b/cc/texture_draw_quad.h
index 6ae0e57a89cdae709e0cce78095e6a3043d04571..8a420fdf0fe047a3c0e93fff5b381e06da51d9dc 100644
--- a/cc/texture_draw_quad.h
+++ b/cc/texture_draw_quad.h
@@ -22,6 +22,7 @@ class CC_EXPORT TextureDrawQuad : public DrawQuad {
               unsigned resource_id,
               bool premultiplied_alpha,
               const gfx::RectF& uv_rect,
+              const float vertex_opacity[4],
               bool flipped);
 
   void SetAll(const SharedQuadState* shared_quad_state,
@@ -32,11 +33,13 @@ class CC_EXPORT TextureDrawQuad : public DrawQuad {
               unsigned resource_id,
               bool premultiplied_alpha,
               const gfx::RectF& uv_rect,
+              const float vertex_opacity[4],
               bool flipped);
 
   unsigned resource_id;
   bool premultiplied_alpha;
   gfx::RectF uv_rect;
+  float vertex_opacity[4];
   bool flipped;
 
   static const TextureDrawQuad* MaterialCast(const DrawQuad*);