Move didFocus from WebWidgetClient to WebViewClient.

content/renderer/render_widget.cc

 // Copyright (c) 2012 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 "content/renderer/render_widget.h"
 
 #include <memory>
 #include <utility>
 
 #include "base/auto_reset.h"
@@ skipping 1201 matching lines @@
     return;
 
   did_show_ = true;
   // NOTE: initial_rect_ may still have its default values at this point, but
   // that's okay.  It'll be ignored if as_popup is false, or the browser
   // process will impose a default position otherwise.
   Send(new ViewHostMsg_ShowWidget(opener_id_, routing_id_, initial_rect_));
   SetPendingWindowRect(initial_rect_);
 }
 
-void RenderWidget::didFocus() {
-}
-
 void RenderWidget::DoDeferredClose() {
   WillCloseLayerTreeView();
   Send(new ViewHostMsg_Close(routing_id_));
 }
 
 void RenderWidget::NotifyOnClose() {
   FOR_EACH_OBSERVER(RenderFrameImpl, render_frames_, WidgetWillClose());
 }
 
 void RenderWidget::closeWidgetSoon() {
@@ skipping 742 matching lines @@
 void RenderWidget::requestPointerUnlock() {
   mouse_lock_dispatcher_->UnlockMouse(webwidget_mouse_lock_target_.get());
 }
 
 bool RenderWidget::isPointerLocked() {
   return mouse_lock_dispatcher_->IsMouseLockedTo(
       webwidget_mouse_lock_target_.get());
 }
 
 }  // namespace content