SurfaceAggregator should check whether output is secure when drawin

cc/quads/texture_draw_quad.h

Index: cc/quads/texture_draw_quad.h
diff --git a/cc/quads/texture_draw_quad.h b/cc/quads/texture_draw_quad.h
index a370fd7232e20928c240100961025faba527562c..c9dd0df01ea94c6e91ee43f6f2b01f7ace3f1883 100644
--- a/cc/quads/texture_draw_quad.h
+++ b/cc/quads/texture_draw_quad.h
@@ -31,7 +31,8 @@ class CC_EXPORT TextureDrawQuad : public DrawQuad {
               SkColor background_color,
               const float vertex_opacity[4],
               bool y_flipped,
-              bool nearest_neighbor);
+              bool nearest_neighbor,
+              bool secure_output_only);
 
   void SetAll(const SharedQuadState* shared_quad_state,
               const gfx::Rect& rect,
@@ -46,7 +47,8 @@ class CC_EXPORT TextureDrawQuad : public DrawQuad {
               SkColor background_color,
               const float vertex_opacity[4],
               bool y_flipped,
-              bool nearest_neighbor);
+              bool nearest_neighbor,
+              bool secure_output_only);
 
   bool premultiplied_alpha;
   gfx::PointF uv_top_left;
@@ -55,6 +57,7 @@ class CC_EXPORT TextureDrawQuad : public DrawQuad {
   float vertex_opacity[4];
   bool y_flipped;
   bool nearest_neighbor;
+  bool secure_output_only = false;
 
   struct OverlayResources {
     OverlayResources();