Remove cc::LayerTreeHostImpl::IsContextLost

cc/trees/single_thread_proxy.cc

Index: cc/trees/single_thread_proxy.cc
diff --git a/cc/trees/single_thread_proxy.cc b/cc/trees/single_thread_proxy.cc
index ab7757966d15c0bc8824a1a3b5d5847ecec56b02..418d42ee1c8df7e8180b568ac8948cd55cca4210 100644
--- a/cc/trees/single_thread_proxy.cc
+++ b/cc/trees/single_thread_proxy.cc
@@ -37,7 +37,8 @@ SingleThreadProxy::SingleThreadProxy(
       layer_tree_host_(layer_tree_host),
       client_(client),
       next_frame_is_newly_committed_frame_(false),
-      inside_draw_(false) {
+      inside_draw_(false),
+      weak_factory_(this) {
   TRACE_EVENT0("cc", "SingleThreadProxy::SingleThreadProxy");
   DCHECK(Proxy::IsMainThread());
   DCHECK(layer_tree_host);
@@ -316,6 +317,18 @@ void SingleThreadProxy::DidLoseOutputSurfaceOnImplThread() {
   // Cause a commit so we can notice the lost context.
   SetNeedsCommitOnImplThread();
   client_->DidAbortSwapBuffers();
+  Proxy::MainThreadTaskRunner()->PostTask(
+      FROM_HERE,
+      base::Bind(&SingleThreadProxy::DidLoseOutputSurface,
+                 weak_factory_.GetWeakPtr()));
+}
+
+void SingleThreadProxy::DidLoseOutputSurface() {
+  DCHECK(Proxy::IsMainThread());
+  TRACE_EVENT0("cc", "SingleThreadProxy::DidLoseOutputSurface");
+
+  // The layer tree host will in turn schedule another commit.
+  layer_tree_host_->DidLoseOutputSurface();
 }
 
 void SingleThreadProxy::DidSwapBuffersOnImplThread() {
@@ -415,7 +428,6 @@ bool SingleThreadProxy::DoComposite(base::TimeTicks frame_begin_time,
   TRACE_EVENT0("cc", "SingleThreadProxy::DoComposite");
   DCHECK(!layer_tree_host_->output_surface_lost());
 
-  bool lost_output_surface = false;
   {
     DebugScopedSetImplThread impl(this);
     base::AutoReset<bool> mark_inside(&inside_draw_, true);
@@ -433,12 +445,9 @@ bool SingleThreadProxy::DoComposite(base::TimeTicks frame_begin_time,
         layer_tree_host_impl_->CurrentBeginFrameArgs().frame_time);
     UpdateBackgroundAnimateTicking();
 
-    if (!layer_tree_host_impl_->IsContextLost()) {
-      layer_tree_host_impl_->PrepareToDraw(frame);
-      layer_tree_host_impl_->DrawLayers(frame, frame_begin_time);
-      layer_tree_host_impl_->DidDrawAllLayers(*frame);
-    }
-    lost_output_surface = layer_tree_host_impl_->IsContextLost();
+    layer_tree_host_impl_->PrepareToDraw(frame);
+    layer_tree_host_impl_->DrawLayers(frame, frame_begin_time);
+    layer_tree_host_impl_->DidDrawAllLayers(*frame);
 
     bool start_ready_animations = true;
     layer_tree_host_impl_->UpdateAnimationState(start_ready_animations);
@@ -446,11 +455,6 @@ bool SingleThreadProxy::DoComposite(base::TimeTicks frame_begin_time,
     layer_tree_host_impl_->ResetCurrentBeginFrameArgsForNextFrame();
   }
 
-  if (lost_output_surface) {
-    layer_tree_host_->DidLoseOutputSurface();
-    return false;
-  }
-
   return true;
 }