Reland: Update TextSelection for non-user initiated events

content/renderer/input/render_widget_input_handler.h

Index: content/renderer/input/render_widget_input_handler.h
diff --git a/content/renderer/input/render_widget_input_handler.h b/content/renderer/input/render_widget_input_handler.h
index 611ff3a19832829770e242ff0045b11ef440e13e..fb9d7919b0fcefdce7c1e52d073b8809a4357285 100644
--- a/content/renderer/input/render_widget_input_handler.h
+++ b/content/renderer/input/render_widget_input_handler.h
@@ -60,6 +60,13 @@ class CONTENT_EXPORT RenderWidgetInputHandler {
     return handling_event_type_;
   }
 
+  bool ime_composition_replacement() const {
+    return ime_composition_replacement_;
+  }
+  void set_ime_composition_replacement(bool ime_composition_replacement) {
+    ime_composition_replacement_ = ime_composition_replacement;
+  }
+
  private:
   RenderWidgetInputHandlerDelegate* const delegate_;
 
@@ -80,6 +87,10 @@ class CONTENT_EXPORT RenderWidgetInputHandler {
   // Indicates if the next sequence of Char events should be suppressed or not.
   bool suppress_next_char_events_;
 
+  // Used to suppress notification about text selection changes triggered by
+  // IME composition when it replaces text.
+  bool ime_composition_replacement_;
+
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetInputHandler);
 };