cc: Change CallFunctionForSubtree to use lambdas.

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 f4780789394c447a1b3a56cfb5925ef325dec6a1..bd79762b43fba932b34fb262b5fa102d5dd8ae77 100644
--- a/cc/trees/layer_tree_host.cc
+++ b/cc/trees/layer_tree_host.cc
@@ -212,10 +212,6 @@ void LayerTreeHost::SetLayerTreeHostClientReady() {
   proxy_->SetLayerTreeHostClientReady();
 }
 
-static void LayerTreeHostOnOutputSurfaceCreatedCallback(Layer* layer) {
-  layer->OnOutputSurfaceCreated();
-}
-
 void LayerTreeHost::DeleteContentsTexturesOnImplThread(
     ResourceProvider* resource_provider) {
   DCHECK(proxy_->IsImplThread());
@@ -424,7 +420,7 @@ void LayerTreeHost::DidInitializeOutputSurface() {
 
   if (root_layer()) {
     LayerTreeHostCommon::CallFunctionForSubtree(
-        root_layer(), base::Bind(&LayerTreeHostOnOutputSurfaceCreatedCallback));
+        root_layer(), [](Layer* layer) { layer->OnOutputSurfaceCreated(); });
   }
 
   client_->DidInitializeOutputSurface();
@@ -866,8 +862,7 @@ bool LayerTreeHost::UpdateLayers(Layer* root_layer,
         kTotalFramesToUseForLCDTextMetrics) {
       LayerTreeHostCommon::CallFunctionForSubtree(
           root_layer,
-          base::Bind(&LayerTreeHost::CalculateLCDTextMetricsCallback,
-                     base::Unretained(this)));
+          [this](Layer* layer) { CalculateLCDTextMetricsCallback(layer); });
       total_frames_used_for_lcd_text_metrics_++;
     }
 
@@ -912,17 +907,12 @@ void LayerTreeHost::TriggerPrepaint() {
   SetNeedsCommit();
 }
 
-static void LayerTreeHostReduceMemoryCallback(Layer* layer) {
-  layer->ReduceMemoryUsage();
-}
-
 void LayerTreeHost::ReduceMemoryUsage() {
   if (!root_layer())
     return;
 
   LayerTreeHostCommon::CallFunctionForSubtree(
-      root_layer(),
-      base::Bind(&LayerTreeHostReduceMemoryCallback));
+      root_layer(), [](Layer* layer) { layer->ReduceMemoryUsage(); });
 }
 
 void LayerTreeHost::SetPrioritiesForSurfaces(size_t surface_memory_bytes) {