Preliminary compositor disabling patch.

cc/layers/layer_impl.cc

 // 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.
 
 #include "cc/layers/layer_impl.h"
 
 #include "base/json/json_reader.h"
 #include "base/strings/stringprintf.h"
 #include "base/trace_event/trace_event.h"
 #include "base/trace_event/trace_event_argument.h"
@@ skipping 582 matching lines @@
   }
 
   layer->PassCopyRequests(&copy_requests_);
 
   // If the main thread commits multiple times before the impl thread actually
   // draws, then damage tracking will become incorrect if we simply clobber the
   // update_rect here. The LayerImpl's update_rect needs to accumulate (i.e.
   // union) any update changes that have occurred on the main thread.
   update_rect_.Union(layer->update_rect());
   layer->SetUpdateRect(update_rect_);
+  overlay_update_rect_.Union(layer->overlay_update_rect());
+  layer->SetOverlayUpdateRect(overlay_update_rect_);
 
   layer->SetStackingOrderChanged(stacking_order_changed_);
   layer->SetDebugInfo(debug_info_);
 
   if (frame_timing_requests_dirty_) {
     layer->PassFrameTimingRequests(&frame_timing_requests_);
     frame_timing_requests_dirty_ = false;
   }
 
   // Reset any state that should be cleared for the next update.
   stacking_order_changed_ = false;
   update_rect_ = gfx::Rect();
+  overlay_update_rect_ = gfx::Rect();
   needs_push_properties_ = false;
   num_dependents_need_push_properties_ = 0;
 }
 
 gfx::Vector2dF LayerImpl::FixedContainerSizeDelta() const {
   if (!scroll_clip_layer_)
     return gfx::Vector2dF();
 
   gfx::Vector2dF delta_from_scroll = scroll_clip_layer_->bounds_delta();
 
@@ skipping 116 matching lines @@
 }
 
 const char* LayerImpl::LayerTypeAsString() const {
   return "cc::LayerImpl";
 }
 
 void LayerImpl::ResetAllChangeTrackingForSubtree() {
   layer_property_changed_ = false;
 
   update_rect_ = gfx::Rect();
+  overlay_update_rect_ = gfx::Rect();
   damage_rect_ = gfx::RectF();
 
   if (render_surface_)
     render_surface_->ResetPropertyChangedFlag();
 
   if (mask_layer_)
     mask_layer_->ResetAllChangeTrackingForSubtree();
 
   if (replica_layer_) {
     // This also resets the replica mask, if it exists.
@@ skipping 312 matching lines @@
   Animation* transform_animation =
       layer_animation_controller_->GetAnimation(Animation::TRANSFORM);
   return transform_animation && transform_animation->is_impl_only();
 }
 
 void LayerImpl::SetUpdateRect(const gfx::Rect& update_rect) {
   update_rect_ = update_rect;
   SetNeedsPushProperties();
 }
 
+void LayerImpl::SetOverlayUpdateRect(const gfx::Rect& overlay_update_rect) {
+  overlay_update_rect_ = overlay_update_rect;
+  SetNeedsPushProperties();
+}
+
 void LayerImpl::AddDamageRect(const gfx::RectF& damage_rect) {
   damage_rect_ = gfx::UnionRects(damage_rect_, damage_rect);
 }
 
 void LayerImpl::SetContentBounds(const gfx::Size& content_bounds) {
   if (this->content_bounds() == content_bounds)
     return;
 
   draw_properties_.content_bounds = content_bounds;
   NoteLayerPropertyChanged();
@@ skipping 511 matching lines @@
   gfx::Transform scaled_draw_transform =
       draw_properties_.target_space_transform;
   scaled_draw_transform.Scale(SK_MScalar1 / scale, SK_MScalar1 / scale);
   gfx::Size scaled_content_bounds =
       gfx::ToCeiledSize(gfx::ScaleSize(content_bounds(), scale));
   return MathUtil::MapEnclosingClippedRect(scaled_draw_transform,
                                            gfx::Rect(scaled_content_bounds));
 }
 
 }  // namespace cc