[mac][views] Notify web_contents focused.

content/browser/renderer_host/render_widget_host_view_mac.mm

 // 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/browser/renderer_host/render_widget_host_view_mac.h"
 
 #import <objc/runtime.h>
 #include <OpenGL/gl.h>
 #include <QuartzCore/QuartzCore.h>
 #include <stdint.h>
@@ skipping 2708 matching lines @@
     return;
 
   if ([[self window] firstResponder] == self)
     renderWidgetHostView_->SetActive(false);
 }
 
 - (BOOL)becomeFirstResponder {
   if (!renderWidgetHostView_->render_widget_host_)
     return NO;
 
-  renderWidgetHostView_->render_widget_host_->Focus();
+  renderWidgetHostView_->render_widget_host_->GotFocus();

[Avi (use Gerrit), 2016/06/01 13:43:38]

Was the call to Focus that used to be here wrong, then?

[yamaxim, 2016/06/01 14:23:55]

yes Now:  WebContentsViewMac::Focus()  then RenderWidgetHostViewCocoa
becomeFirstResponder then WebContentsViewMac::GotFocus

so i think it's right

   renderWidgetHostView_->SetTextInputActive(true);
 
   // Cancel any onging composition text which was left before we lost focus.
   // TODO(suzhe): We should do it in -resignFirstResponder: method, but
   // somehow that method won't be called when switching among different tabs.
   // See http://crbug.com/47209
   [self cancelComposition];
 
   NSNumber* direction = [NSNumber numberWithUnsignedInteger:
       [[self window] keyViewSelectionDirection]];
@@ skipping 696 matching lines @@
 
 // "-webkit-app-region: drag | no-drag" is implemented on Mac by excluding
 // regions that are not draggable. (See ControlRegionView in
 // native_app_window_cocoa.mm). This requires the render host view to be
 // draggable by default.
 - (BOOL)mouseDownCanMoveWindow {
   return YES;
 }
 
 @end