Fix tab focus/blur events on tab switch on the Mac

chrome/browser/cocoa/tab_contents_controller.mm

 // Copyright (c) 2009 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.
 
 #import "chrome/browser/cocoa/tab_contents_controller.h"
 
 #include "base/mac_util.h"
 #include "base/sys_string_conversions.h"
 #include "chrome/browser/bookmarks/bookmark_model.h"
 #include "chrome/browser/tab_contents/tab_contents.h"
@@ skipping 21 matching lines @@
   [contentsBox_ setContentView:contents_->GetNativeView()];
 }
 
 // Returns YES if the tab represented by this controller is the front-most.
 - (BOOL)isCurrentTab {
   // We're the current tab if we're in the view hierarchy, otherwise some other
   // tab is.
   return [[self view] superview] ? YES : NO;
 }
 
+- (void)willBecomeUnselectedTab {
+  RenderViewHost* rvh = contents_->render_view_host();
+  if (rvh)
+    rvh->Blur();
+}
+
 - (void)willBecomeSelectedTab {
+  RenderViewHost* rvh = contents_->render_view_host();
+  if (rvh)
+    rvh->Focus();
 }
 
 - (void)tabDidChange:(TabContents*)updatedContents {
   // Calling setContentView: here removes any first responder status
   // the view may have, so avoid changing the view hierarchy unless
   // the view is different.
   if (contents_ != updatedContents) {
     contents_ = updatedContents;
     [contentsBox_ setContentView:contents_->GetNativeView()];
   }
 }
 
 @end