cc: Simplify the logic for deciding to update tile priorities.

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 <algorithm>
 
 #include "base/basictypes.h"
 #include "base/debug/trace_event.h"
@@ skipping 211 matching lines @@
 void LayerTreeHostImpl::BeginCommit() {}
 
 void LayerTreeHostImpl::CommitComplete() {
   TRACE_EVENT0("cc", "LayerTreeHostImpl::CommitComplete");
 
   // Impl-side painting needs an update immediately post-commit to have the
   // opportunity to create tilings.  Other paths can call UpdateDrawProperties
   // more lazily when needed prior to drawing.
   if (settings_.impl_side_painting) {
     pending_tree_->set_needs_update_draw_properties();
-    pending_tree_->UpdateDrawProperties(LayerTreeImpl::UPDATE_PENDING_TREE);
+    pending_tree_->UpdateDrawProperties();
   } else {
     active_tree_->set_needs_update_draw_properties();
   }
 
   client_->SendManagedMemoryStats();
 }
 
 bool LayerTreeHostImpl::CanDraw() {
   // Note: If you are changing this function or any other function that might
   // affect the result of CanDraw, make sure to call
@@ skipping 604 matching lines @@
       it = frame->render_passes.size() - position_from_end;
       DCHECK_GE(frame->render_passes.size(), position_from_end);
     }
   }
 }
 
 bool LayerTreeHostImpl::PrepareToDraw(FrameData* frame,
                                       gfx::Rect device_viewport_damage_rect) {
   TRACE_EVENT0("cc", "LayerTreeHostImpl::PrepareToDraw");
 
-  active_tree_->UpdateDrawProperties(
-      LayerTreeImpl::UPDATE_ACTIVE_TREE_FOR_DRAW);
+  active_tree_->UpdateDrawProperties();
 
   frame->render_surface_layer_list = &active_tree_->RenderSurfaceLayerList();
   frame->render_passes.clear();
   frame->render_passes_by_id.clear();
   frame->will_draw_layers.clear();
   frame->contains_incomplete_tile = false;
   frame->has_no_damage = false;
 
   if (active_tree_->root_layer()) {
     device_viewport_damage_rect.Union(viewport_damage_rect_);
@@ skipping 354 matching lines @@
   if (tile_manager_)
     tile_manager_->CheckForCompletedTileUploads();
 }
 
 bool LayerTreeHostImpl::ActivatePendingTreeIfNeeded() {
   if (!pending_tree_)
     return false;
 
   CHECK(tile_manager_);
 
-  pending_tree_->UpdateDrawProperties(LayerTreeImpl::UPDATE_PENDING_TREE);
+  pending_tree_->UpdateDrawProperties();
 
   TRACE_EVENT_ASYNC_STEP1("cc",
                           "PendingTree", pending_tree_.get(), "activate",
                           "state", ValueToString(ActivationStateAsValue()));
 
   // Activate once all visible resources in pending tree are ready.
   if (!pending_tree_->AreVisibleResourcesReady())
     return false;
 
   ActivatePendingTree();
@@ skipping 188 matching lines @@
   active_tree_->UpdateMaxScrollOffset();
 }
 
 void LayerTreeHostImpl::DidChangeTopControlsPosition() {
   client_->SetNeedsRedrawOnImplThread();
   active_tree_->set_needs_update_draw_properties();
   SetFullRootLayerDamage();
 }
 
 bool LayerTreeHostImpl::EnsureRenderSurfaceLayerList() {
-  active_tree_->UpdateDrawProperties(LayerTreeImpl::UPDATE_ACTIVE_TREE);
+  active_tree_->UpdateDrawProperties();
   return !active_tree_->RenderSurfaceLayerList().empty();
 }
 
 InputHandlerClient::ScrollStatus LayerTreeHostImpl::ScrollBegin(
     gfx::Point viewport_point, InputHandlerClient::ScrollInputType type) {
   TRACE_EVENT0("cc", "LayerTreeHostImpl::ScrollBegin");
 
   if (top_controls_manager_)
     top_controls_manager_->ScrollBegin();
 
@@ skipping 642 matching lines @@
 }
 
 void LayerTreeHostImpl::SetDebugState(const LayerTreeDebugState& debug_state) {
   if (debug_state_.continuous_painting != debug_state.continuous_painting)
     paint_time_counter_->ClearHistory();
 
   debug_state_ = debug_state;
 }
 
 }  // namespace cc