Add flag for drawing layers to screen with Ganesh

cc/layers/draw_properties.h

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_LAYERS_DRAW_PROPERTIES_H_
 #define CC_LAYERS_DRAW_PROPERTIES_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "ui/gfx/rect.h"
 #include "ui/gfx/transform.h"
 
 namespace cc {
 
 // Container for properties that layers need to compute before they can be
 // drawn.
 template <typename LayerType, typename RenderSurfaceType>
 struct CC_EXPORT DrawProperties {
   DrawProperties()
       : opacity(0.f),
         opacity_is_animating(false),
         screen_space_opacity_is_animating(false),
         target_space_transform_is_animating(false),
         screen_space_transform_is_animating(false),
         can_use_lcd_text(false),
         is_clipped(false),
         render_target(NULL),
         contents_scale_x(1.f),
         contents_scale_y(1.f),
         num_descendants_that_draw_content(0),
-        descendants_can_clip_selves(false) {}
+        descendants_can_clip_selves(false),
+        can_draw_directly_to_backbuffer(false) {}
 
   // Transforms objects from content space to target surface space, where
   // this layer would be drawn.
   gfx::Transform target_space_transform;
 
   // Transforms objects from content space to screen space (viewport space).
   gfx::Transform screen_space_transform;
 
   // DrawProperties::opacity may be different than LayerType::opacity,
   // particularly in the case when a RenderSurface re-parents the layer's
@@ skipping 41 matching lines @@
   float contents_scale_x;
   float contents_scale_y;
   gfx::Size content_bounds;
 
   // Does not include this layer itself, only its children and descendants.
   int num_descendants_that_draw_content;
 
   // If true, every descendant in the sub-tree can clip itself without the
   // need to use hardware sissoring or a new render target.
   bool descendants_can_clip_selves;
+
+  bool can_draw_directly_to_backbuffer;
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_DRAW_PROPERTIES_H_