Fix tabbing into web area not focusing first element....

chrome/browser/renderer_host/render_widget_host_view_mac.mm

 // 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 <QuartzCore/QuartzCore.h>
 
 #include "chrome/browser/renderer_host/render_widget_host_view_mac.h"
 
 #include "app/app_switches.h"
 #include "app/surface/io_surface_support_mac.h"
@@ skipping 1649 matching lines @@
   renderWidgetHostView_->render_widget_host_->Focus();
   renderWidgetHostView_->render_widget_host_->SetInputMethodActive(true);
   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]];
+  NSDictionary* userInfo =
+      [NSDictionary dictionaryWithObject:direction
+                                  forKey:kSelectionDirection];
+  [[NSNotificationCenter defaultCenter]
+      postNotificationName:kViewDidBecomeFirstResponder
+                    object:self
+                  userInfo:userInfo];
+
   return YES;
 }
 
 - (BOOL)resignFirstResponder {
   renderWidgetHostView_->SetTextInputActive(false);
   if (!renderWidgetHostView_->render_widget_host_)
     return YES;
 
   if (closeOnDeactivate_)
     renderWidgetHostView_->KillSelf();
@@ skipping 833 matching lines @@
   if (!string) return NO;
 
   // If the user is currently using an IME, confirm the IME input,
   // and then insert the text from the service, the same as TextEdit and Safari.
   [self confirmComposition];
   [self insertText:string];
   return YES;
 }
 
 @end