Hide fullscreen rotation jank

cc/trees/layer_tree_host_impl.cc

 // Copyright 2011 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/trees/layer_tree_host_impl.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 1589 matching lines @@
 }
 
 CompositorFrameMetadata LayerTreeHostImpl::MakeCompositorFrameMetadata() const {
   CompositorFrameMetadata metadata;
   metadata.device_scale_factor = active_tree_->painted_device_scale_factor() *
                                  active_tree_->device_scale_factor();
 
   metadata.page_scale_factor = active_tree_->current_page_scale_factor();
   metadata.scrollable_viewport_size = active_tree_->ScrollableViewportSize();
   metadata.root_layer_size = active_tree_->ScrollableSize();
+  metadata.device_viewport_size = active_tree_->device_viewport_size();
   metadata.min_page_scale_factor = active_tree_->min_page_scale_factor();
   metadata.max_page_scale_factor = active_tree_->max_page_scale_factor();
   metadata.top_controls_height =
       browser_controls_offset_manager_->TopControlsHeight();
   metadata.top_controls_shown_ratio =
       browser_controls_offset_manager_->TopControlsShownRatio();
   metadata.bottom_controls_height =
       browser_controls_offset_manager_->BottomControlsHeight();
   metadata.bottom_controls_shown_ratio =
       browser_controls_offset_manager_->BottomControlsShownRatio();
@@ skipping 32 matching lines @@
 
   metadata.root_overflow_x_hidden |=
       !InnerViewportScrollLayer()->user_scrollable_horizontal();
   metadata.root_overflow_y_hidden |=
       !InnerViewportScrollLayer()->user_scrollable_vertical();
 
   // TODO(miletus) : Change the metadata to hold ScrollOffset.
   metadata.root_scroll_offset =
       gfx::ScrollOffsetToVector2dF(active_tree_->TotalScrollOffset());
 
+  metadata.is_fullscreen = is_fullscreen_;
+
   return metadata;
 }
 
 bool LayerTreeHostImpl::DrawLayers(FrameData* frame) {
   DCHECK(CanDraw());
   DCHECK_EQ(frame->has_no_damage, frame->render_passes.empty());
 
   TRACE_EVENT0("cc,benchmark", "LayerTreeHostImpl::DrawLayers");
 
   ResetRequiresHighResToDraw();
@@ skipping 518 matching lines @@
   if (visible_) {
     // TODO(crbug.com/469175): Replace with RequiresHighResToDraw.
     SetRequiresHighResToDraw();
   } else {
     EvictAllUIResources();
     // Call PrepareTiles to evict tiles when we become invisible.
     PrepareTiles();
   }
 }
 
+void LayerTreeHostImpl::SetIsFullscreen(bool is_fullscreen) {
+  DCHECK(task_runner_provider_->IsImplThread());
+
+  is_fullscreen_ = is_fullscreen;
+}
+
 void LayerTreeHostImpl::SetNeedsOneBeginImplFrame() {
   // TODO(miletus): This is just the compositor-thread-side call to the
   // SwapPromiseMonitor to say something happened that may cause a swap in the
   // future. The name should not refer to SetNeedsRedraw but it does for now.
   NotifySwapPromiseMonitorsOfSetNeedsRedraw();
   client_->SetNeedsOneBeginImplFrameOnImplThread();
 }
 
 void LayerTreeHostImpl::SetNeedsRedraw() {
   NotifySwapPromiseMonitorsOfSetNeedsRedraw();
@@ skipping 2155 matching lines @@
 
 void LayerTreeHostImpl::ShowScrollbarsForImplScroll(ElementId element_id) {
   if (!element_id)
     return;
   if (ScrollbarAnimationController* animation_controller =
           ScrollbarAnimationControllerForElementId(element_id))
     animation_controller->DidScrollUpdate();
 }
 
 }  // namespace cc