Add a hide_layer_and_subtree() flag to cc::Layer

cc/layers/layer.cc

 // Copyright 2010 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.h"
 
 #include <algorithm>
 
 #include "base/metrics/histogram.h"
 #include "cc/animation/animation.h"
@@ skipping 28 matching lines @@
       scrollable_(false),
       should_scroll_on_main_thread_(false),
       have_wheel_event_handlers_(false),
       anchor_point_(0.5f, 0.5f),
       background_color_(0),
       compositing_reasons_(kCompositingReasonUnknown),
       opacity_(1.f),
       anchor_point_z_(0.f),
       is_container_for_fixed_position_layers_(false),
       is_drawable_(false),
+      hide_layer_and_subtree_(false),
       masks_to_bounds_(false),
       contents_opaque_(false),
       double_sided_(true),
       preserves_3d_(false),
       use_parent_backface_visibility_(false),
       draw_checkerboard_for_missing_tiles_(false),
       force_render_surface_(false),
       replica_layer_(NULL),
       raster_scale_(0.f),
       layer_scroll_client_(NULL) {
@@ skipping 545 matching lines @@
 
 void Layer::SetIsDrawable(bool is_drawable) {
   DCHECK(IsPropertyChangeAllowed());
   if (is_drawable_ == is_drawable)
     return;
 
   is_drawable_ = is_drawable;
   SetNeedsCommit();
 }
 
+void Layer::SetHideLayerAndSubtree(bool hide) {
+  DCHECK(IsPropertyChangeAllowed());
+  if (hide_layer_and_subtree_ == hide)
+    return;
+
+  hide_layer_and_subtree_ = hide;
+  SetNeedsCommit();
+}
+
 void Layer::SetNeedsDisplayRect(const gfx::RectF& dirty_rect) {
   update_rect_.Union(dirty_rect);
   needs_display_ = true;
 
   // Simply mark the contents as dirty. For non-root layers, the call to
   // SetNeedsCommit will schedule a fresh compositing pass.
   // For the root layer, SetNeedsCommit has no effect.
   if (DrawsContent() && !update_rect_.IsEmpty())
     SetNeedsCommit();
 }
@@ skipping 48 matching lines @@
   layer->SetBounds(paint_properties_.bounds);
   layer->SetContentBounds(content_bounds());
   layer->SetContentsScale(contents_scale_x(), contents_scale_y());
   layer->SetDebugName(debug_name_);
   layer->SetCompositingReasons(compositing_reasons_);
   layer->SetDoubleSided(double_sided_);
   layer->SetDrawCheckerboardForMissingTiles(
       draw_checkerboard_for_missing_tiles_);
   layer->SetForceRenderSurface(force_render_surface_);
   layer->SetDrawsContent(DrawsContent());
+  layer->SetHideLayerAndSubtree(hide_layer_and_subtree_);
   layer->SetFilters(filters());
   layer->SetFilter(filter());
   layer->SetBackgroundFilters(background_filters());
   layer->SetMasksToBounds(masks_to_bounds_);
   layer->SetShouldScrollOnMainThread(should_scroll_on_main_thread_);
   layer->SetHaveWheelEventHandlers(have_wheel_event_handlers_);
   layer->SetNonFastScrollableRegion(non_fast_scrollable_region_);
   layer->SetTouchEventHandlerRegion(touch_event_handler_region_);
   layer->SetContentsOpaque(contents_opaque_);
   if (!layer->OpacityIsAnimatingOnImplOnly() && !OpacityIsAnimating())
@@ skipping 190 matching lines @@
 
 RenderingStatsInstrumentation* Layer::rendering_stats_instrumentation() const {
   return layer_tree_host_->rendering_stats_instrumentation();
 }
 
 bool Layer::SupportsLCDText() const {
   return false;
 }
 
 }  // namespace cc