Fix IME support for --enable-threaded-compositing

content/renderer/render_widget.cc

Index: content/renderer/render_widget.cc
diff --git a/content/renderer/render_widget.cc b/content/renderer/render_widget.cc
index 70534c3dcd539ac3dd378fcdcff2548a53216389..27dfd84128769de07ad6c693d57ee85e96cc17c2 100644
--- a/content/renderer/render_widget.cc
+++ b/content/renderer/render_widget.cc
@@ -1114,6 +1114,15 @@ void RenderWidget::didDeactivateCompositor() {
 
 void RenderWidget::willBeginCompositorFrame() {
   TRACE_EVENT0("gpu", "RenderWidget::willBeginCompositorFrame");
+
+  DCHECK(RenderThreadImpl::current()->compositor_thread());
+
+  // The following two can result in further layout and possibly
+  // enable GPU acceleration so they need to be called before any painting
+  // is done.
+  UpdateTextInputState();
+  UpdateSelectionBounds();
+
   WillInitiatePaint();
 }