[Mac] Update tab close button when user drags outside

chrome/browser/ui/cocoa/hover_close_button.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/hover_close_button.h"
 
 #include "base/strings/sys_string_conversions.h"
 #include "chrome/app/vector_icons/vector_icons.h"
 #include "chrome/grit/generated_resources.h"
 #include "components/strings/grit/components_strings.h"
@@ skipping 41 matching lines @@
 + (void)initialize {
   // Grab some strings that are used by all close buttons.
   if (!gBasicAccessibilityTitle) {
     gBasicAccessibilityTitle = [l10n_util::GetNSStringWithFixup(
         IDS_ACCNAME_CLOSE) copy];
   }
   if (!gTooltip)
     gTooltip = [l10n_util::GetNSStringWithFixup(IDS_TOOLTIP_CLOSE_TAB) copy];
 }
 
-- (id)initWithFrame:(NSRect)frameRect {
-  if ((self = [super initWithFrame:frameRect])) {
-    [self commonInit];
-  }
-  return self;
-}
+- (void)commonInit {
+  [super commonInit];
 
-- (void)awakeFromNib {
-  [super awakeFromNib];
-  [self commonInit];
+  [self setAccessibilityTitle:nil];
+
+  // Add a tooltip. Using 'owner:self' means that
+  // -view:stringForToolTip:point:userData: will be called to provide the
+  // tooltip contents immediately before showing it.
+  [self addToolTipRect:[self bounds] owner:self userData:NULL];
+
+  previousState_ = kHoverStateNone;
+  iconColor_ = kDefaultIconColor;
 }
 
 - (void)removeFromSuperview {
   // -stopAnimation will call the animationDidStop: delegate method
   // which will release our animation.
   [fadeOutAnimation_ stopAnimation];
   [super removeFromSuperview];
 }
 
 - (void)animationDidStop:(NSAnimation*)animation {
@@ skipping 109 matching lines @@
       [fadeOutAnimation_ setDelegate:self];
       [fadeOutAnimation_ startAnimation];
     } else {
       // -stopAnimation will call the animationDidStop: delegate method
       // which will clean up the animation.
       [fadeOutAnimation_ stopAnimation];
     }
   }
 }
 
-- (void)commonInit {
-  [self setAccessibilityTitle:nil];
-
-  // Add a tooltip. Using 'owner:self' means that
-  // -view:stringForToolTip:point:userData: will be called to provide the
-  // tooltip contents immediately before showing it.
-  [self addToolTipRect:[self bounds] owner:self userData:NULL];
-
-  previousState_ = kHoverStateNone;
-  iconColor_ = kDefaultIconColor;
-}
-
 // Called each time a tooltip is about to be shown.
 - (NSString*)view:(NSView*)view
  stringForToolTip:(NSToolTipTag)tag
             point:(NSPoint)point
          userData:(void*)userData {
   if (self.hoverState == kHoverStateMouseOver) {
     // In some cases (e.g. the download tray), the button is still in the
     // hover state, but is outside the bounds of its parent and not visible.
     // Don't show the tooltip in that case.
     NSRect buttonRect = [self frame];
@@ skipping 39 matching lines @@
       break;
     case kHoverStateMouseDown:
       imageID = IDR_CLOSE_DIALOG_P;
       break;
   }
   ui::ResourceBundle& bundle = ui::ResourceBundle::GetSharedInstance();
   return bundle.GetNativeImageNamed(imageID).ToNSImage();
 }
 
 @end