[Mac] Implement the system dictionary popup by implementing NSTextInput methods.

chrome/browser/renderer_host/render_widget_host_view_views.cc

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/renderer_host/render_widget_host_view_views.h"
 
 #include <algorithm>
 #include <string>
 
 #include "base/command_line.h"
@@ skipping 462 matching lines @@
     parent()->RemoveChildView(this);
   MessageLoop::current()->DeleteSoon(FROM_HERE, this);
 }
 
 void RenderWidgetHostViewViews::SetTooltipText(const std::wstring& tip) {
   // TODO(anicolao): decide if we want tooltips for touch (none specified
   // right now/might want a press-and-hold display)
   // NOTIMPLEMENTED(); ... too annoying, it triggers for every mousemove
 }
 
-void RenderWidgetHostViewViews::SelectionChanged(const std::string& text) {
+void RenderWidgetHostViewViews::SelectionChanged(const std::string& text,
+                                                 int start,
+                                                 int end) {
   // TODO(anicolao): deal with the clipboard without GTK
   NOTIMPLEMENTED();
 }
 
 void RenderWidgetHostViewViews::ShowingContextMenu(bool showing) {
   is_showing_context_menu_ = showing;
 }
 
 bool RenderWidgetHostViewViews::NeedsInputGrab() {
   return popup_type_ == WebKit::WebPopupTypeSelect;
@@ skipping 474 matching lines @@
 }
 
 // static
 RenderWidgetHostView*
     RenderWidgetHostView::GetRenderWidgetHostViewFromNativeView(
         gfx::NativeView widget) {
   gpointer user_data = g_object_get_data(G_OBJECT(widget),
                                          kRenderWidgetHostViewKey);
   return reinterpret_cast<RenderWidgetHostView*>(user_data);
 }