cc: Clear checker-image tracking on navigation and visibility changes.

cc/trees/layer_tree_host.cc

Index: cc/trees/layer_tree_host.cc
diff --git a/cc/trees/layer_tree_host.cc b/cc/trees/layer_tree_host.cc
index 11a354ab33e91e5fba1808882b707e6504131573..1a3e1c9263cbbc08b963015ea1c90ce139b4ab84 100644
--- a/cc/trees/layer_tree_host.cc
+++ b/cc/trees/layer_tree_host.cc
@@ -301,6 +301,12 @@ void LayerTreeHost::FinishCommitOnImplThread(
   if (needs_full_tree_sync_)
     TreeSynchronizer::SynchronizeTrees(root_layer(), sync_tree);
 
+  // Track the navigation state before pushing properties since it overwrites
+  // the |content_source_id_| on the sync tree.
+  bool did_navigate = content_source_id_ != sync_tree->content_source_id();
+  if (did_navigate)
+    host_impl->ClearImageCacheOnNavigation();
+
   PushPropertiesTo(sync_tree);
 
   sync_tree->PassSwapPromises(swap_promise_manager_.TakeSwapPromises());
@@ -314,11 +320,6 @@ void LayerTreeHost::FinishCommitOnImplThread(
   sync_tree->SetDeviceScaleFactor(device_scale_factor_);
   host_impl->SetDebugState(debug_state_);
 
-  if (did_navigate_) {
-    did_navigate_ = false;
-    host_impl->ClearImageCacheOnNavigation();
-  }
-
   sync_tree->set_ui_resource_request_queue(
       ui_resource_manager_->TakeUIResourcesRequests());
 
@@ -878,7 +879,6 @@ void LayerTreeHost::SetRootLayer(scoped_refptr<Layer> root_layer) {
   ResetGpuRasterizationTracking();
 
   SetNeedsFullTreeSync();
-  did_navigate_ = true;
 }
 
 void LayerTreeHost::RegisterViewportLayers(