Switch to sending IME selection updates early.

content/browser/renderer_host/render_widget_host_view_android.cc

Index: content/browser/renderer_host/render_widget_host_view_android.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_android.cc b/content/browser/renderer_host/render_widget_host_view_android.cc
index 3b94566748f4d5fdbc9faa3fda6fb1f5194531fb..f68e343d4670cf05cd9c5d2ca964159539ee980d 100644
--- a/content/browser/renderer_host/render_widget_host_view_android.cc
+++ b/content/browser/renderer_host/render_widget_host_view_android.cc
@@ -165,8 +165,6 @@ bool RenderWidgetHostViewAndroid::OnMessageReceived(
     const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(RenderWidgetHostViewAndroid, message)
-    IPC_MESSAGE_HANDLER(ViewHostMsg_ImeBatchStateChanged_ACK,
-                        OnProcessImeBatchStateAck)
     IPC_MESSAGE_HANDLER(ViewHostMsg_StartContentIntent, OnStartContentIntent)
     IPC_MESSAGE_HANDLER(ViewHostMsg_DidChangeBodyBackgroundColor,
                         OnDidChangeBodyBackgroundColor)
@@ -439,12 +437,7 @@ void RenderWidgetHostViewAndroid::OnTextInputStateChanged(
       static_cast<int>(params.type),
       params.value, params.selection_start, params.selection_end,
       params.composition_start, params.composition_end,
-      params.show_ime_if_needed);
-}
-
-void RenderWidgetHostViewAndroid::OnProcessImeBatchStateAck(bool is_begin) {
-  if (content_view_core_)
-    content_view_core_->ProcessImeBatchStateAck(is_begin);
+      params.show_ime_if_needed, params.require_ack);
 }
 
 void RenderWidgetHostViewAndroid::OnDidChangeBodyBackgroundColor(