Revert of Compute if a layer is clipped outside CalcDrawProps

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 "cc/trees/occlusion.h"
 #include "third_party/skia/include/core/SkXfermode.h"
 #include "ui/gfx/geometry/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>
 struct CC_EXPORT DrawProperties {
   DrawProperties()
       : opacity(0.f),
         blend_mode(SkXfermode::kSrcOver_Mode),
         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(nullptr),
         num_unclipped_descendants(0),
         layer_or_descendant_has_copy_request(false),
         layer_or_descendant_has_input_handler(false),
         has_child_with_a_scroll_parent(false),
         index_of_first_descendants_addition(0),
         num_descendants_added(0),
         index_of_first_render_surface_layer_list_addition(0),
         num_render_surfaces_added(0),
         last_drawn_render_surface_layer_list_id(0),
@@ skipping 25 matching lines @@
   // animating, the main thread may not have the same values that are used
   // to draw.
   bool opacity_is_animating;
   bool screen_space_opacity_is_animating;
   bool target_space_transform_is_animating;
   bool screen_space_transform_is_animating;
 
   // True if the layer can use LCD text.
   bool can_use_lcd_text;
 
+  // True if the layer needs to be clipped by clip_rect.
+  bool is_clipped;
+
   // The layer whose coordinate space this layer draws into. This can be
   // either the same layer (draw_properties_.render_target == this) or an
   // ancestor of this layer.
   LayerType* render_target;
 
   // This rect is a bounding box around what part of the layer is visible, in
   // the layer's coordinate space.
   gfx::Rect visible_layer_rect;
 
   // In target surface space, the rect that encloses the clipped, drawable
@@ skipping 47 matching lines @@
   float maximum_animation_contents_scale;
 
   // The scale during the layer animation start at which content should be
   // rastered at to be crisp.
   float starting_animation_contents_scale;
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_DRAW_PROPERTIES_H_