Chromium plumbing to use the selection root bounds.

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 198d7d4cdfeef0e149fe91ac495c13cadc3f0f95..25b8bcef469dfdbcfc8dfc381d5cf6a6bc7b6155 100644
--- a/content/renderer/render_widget.cc
+++ b/content/renderer/render_widget.cc
@@ -1499,6 +1499,9 @@ void RenderWidget::DoDeferredUpdate() {
   // enable GPU acceleration so they need to be called before any painting
   // is done.
   UpdateTextInputType();
+#if defined(OS_ANDROID)
+  UpdateSelectionRootBounds();
+#endif
   UpdateSelectionBounds();
 
   // Suppress painting if nothing is dirty.  This has to be done after updating
@@ -1884,6 +1887,7 @@ void RenderWidget::willBeginCompositorFrame() {
   UpdateTextInputType();
 #if defined(OS_ANDROID)
   UpdateTextInputState(false, true);
+  UpdateSelectionRootBounds();
 #endif
   UpdateSelectionBounds();
 }
@@ -2387,6 +2391,9 @@ void RenderWidget::FinishHandlingImeEvent() {
   // While handling an ime event, text input state and selection bounds updates
   // are ignored. These must explicitly be updated once finished handling the
   // ime event.
+#if defined(OS_ANDROID)
+  UpdateSelectionRootBounds();
+#endif
   UpdateSelectionBounds();
 #if defined(OS_ANDROID)
   UpdateTextInputState(false, false);