Revert 204014 "Don't track whether a resize ack is pending durin..."

trunk/src/content/browser/renderer_host/render_widget_host_impl.cc

Index: trunk/src/content/browser/renderer_host/render_widget_host_impl.cc
===================================================================
--- trunk/src/content/browser/renderer_host/render_widget_host_impl.cc	(revision 204037)
+++ trunk/src/content/browser/renderer_host/render_widget_host_impl.cc	(working copy)
@@ -85,8 +85,6 @@
 namespace content {
 namespace {
 
-bool g_check_for_pending_resize_ack = true;
-
 // How long to (synchronously) wait for the renderer to respond with a
 // PaintRect message, when our backing-store is invalid, before giving up and
 // returning a null or incorrectly sized backing-store from GetBackingStore.
@@ -1217,11 +1215,6 @@
   return GetRoutingID() | (static_cast<int64>(GetProcess()->GetID()) << 32);
 }
 
-// static
-void RenderWidgetHostImpl::DisableResizeAckCheckForTesting() {
-  g_check_for_pending_resize_ack = false;
-}
-
 ui::LatencyInfo RenderWidgetHostImpl::NewInputLatencyInfo() {
   ui::LatencyInfo info;
   info.AddLatencyNumber(ui::INPUT_EVENT_LATENCY_COMPONENT,
@@ -1744,7 +1737,7 @@
   // resize_ack_pending_ needs to be cleared before we call DidPaintRect, since
   // that will end up reaching GetBackingStore.
   if (is_resize_ack) {
-    DCHECK(!g_check_for_pending_resize_ack || resize_ack_pending_);
+    DCHECK(resize_ack_pending_);
     resize_ack_pending_ = false;
     in_flight_size_.SetSize(0, 0);
   }