Mac: Update the tooltip view tooltip when a tab's title changes.

chrome/browser/ui/cocoa/tabs/tab_strip_controller.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.
 
 #import "chrome/browser/ui/cocoa/tabs/tab_strip_controller.h"
 
 #import <QuartzCore/QuartzCore.h>
 
 #include <cmath>
 #include <limits>
@@ skipping 1203 matching lines @@
 // Handles setting the title of the tab based on the given |contents|. Uses
 // a canned string if |contents| is NULL.
 - (void)setTabTitle:(TabController*)tab withContents:(WebContents*)contents {
   base::string16 title;
   if (contents)
     title = contents->GetTitle();
   if (title.empty())
     title = l10n_util::GetStringUTF16(IDS_BROWSER_WINDOW_MAC_TAB_UNTITLED);
   [tab setTitle:base::SysUTF16ToNSString(title)];
 
-  const base::string16& toolTip = chrome::AssembleTabTooltipText(
-      title, [self alertStateForContents:contents]);
-  [tab setToolTip:base::SysUTF16ToNSString(toolTip)];
+  NSString* toolTip = base::SysUTF16ToNSString(chrome::AssembleTabTooltipText(
+      title, [self alertStateForContents:contents]));
+  [tab setToolTip:toolTip];
+  if ([tab tabView] == hoveredTab_)
+    [toolTipView_ setToolTip:toolTip];
 }
 
 // Called when a notification is received from the model to insert a new tab
 // at |modelIndex|.
 - (void)insertTabWithContents:(content::WebContents*)contents
                       atIndex:(NSInteger)modelIndex
                  inForeground:(bool)inForeground {
   DCHECK(contents);
   DCHECK(modelIndex == TabStripModel::kNoTab ||
          tabStripModel_->ContainsIndex(modelIndex));
@@ skipping 644 matching lines @@
     [newHoveredTab mouseEntered:nil];
 
     // Use a transparent subview to show the hovered tab's tooltip while the
     // mouse pointer is inside the tab's custom shape.
     if (!toolTipView_)
       toolTipView_.reset([[NSView alloc] init]);
     [toolTipView_ setToolTip:[newHoveredTab toolTipText]];
     [toolTipView_ setFrame:[newHoveredTab frame]];
     if (![toolTipView_ superview]) {
       [tabStripView_ addSubview:toolTipView_
-                     positioned:NSWindowBelow
-                     relativeTo:nil];
+                     positioned:NSWindowAbove
+                     relativeTo:dragBlockingView_];
     }
   }
 }
 
 // Enable/Disable the tracking areas for the tabs. They are only enabled
 // when the mouse is in the tabstrip.
 - (void)setTabTrackingAreasEnabled:(BOOL)enabled {
   NSNotificationCenter* defaultCenter = [NSNotificationCenter defaultCenter];
   for (TabController* controller in tabArray_.get()) {
     TabView* tabView = [controller tabView];
@@ skipping 388 matching lines @@
 
 - (TabAlertState)alertStateForContents:(content::WebContents*)contents {
   return chrome::GetTabAlertStateForContents(contents);
 }
 
 - (void)themeDidChangeNotification:(NSNotification*)notification {
   [newTabButton_ setImages];
 }
 
 @end