Add a 1px white bezel under the dark line separating the tab strip and the to...

chrome/browser/cocoa/tab_strip_view.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_strip_view.h"
 
 #include "base/mac_util.h"
 #import "chrome/browser/cocoa/browser_window_controller.h"
 #import "chrome/browser/cocoa/tab_strip_controller.h"
 #include "base/logging.h"
@@ skipping 13 matching lines @@
 
     // Register to be an URL drop target.
     dropHandler_.reset([[URLDropTargetHandler alloc] initWithView:self]);
   }
   return self;
 }
 
 - (void)drawRect:(NSRect)rect {
   NSRect boundsRect = [self bounds];
   NSRect borderRect, contentRect;
+
+  // Draw bottom border (a dark border and light highlight). Each tab is
+  // responsible for mimicing this bottom border, unless it's the selected
+  // tab.
+  borderRect = boundsRect;
+  borderRect.origin.y = 1;
+  borderRect.size.height = 1;
+  [[NSColor colorWithCalibratedWhite:0.0 alpha:0.2] set];
+  NSRectFillUsingOperation(borderRect, NSCompositeSourceOver);
   NSDivideRect(boundsRect, &borderRect, &contentRect, 1, NSMinYEdge);
-  [[NSColor colorWithCalibratedWhite:0.0 alpha:0.2] set];
-
+  [[NSColor colorWithCalibratedWhite:0.96 alpha:1.0] set];
   NSRectFillUsingOperation(borderRect, NSCompositeSourceOver);
 
   // Draw drop-indicator arrow (if appropriate).
   // TODO(viettrungluu): this is all a stop-gap measure.
   if ([self dropArrowShown]) {
     // Programmer art: an arrow parametrized by many knobs. Note that the arrow
     // points downwards (so understand "width" and "height" accordingly).
 
     // How many (pixels) to inset on the top/bottom.
     const CGFloat kArrowTopInset = 1.5;
@@ skipping 113 matching lines @@
 }
 
 - (id)accessibilityAttributeValue:(NSString*)attribute {
   if ([attribute isEqual:NSAccessibilityRoleAttribute])
     return NSAccessibilityGroupRole;
 
   return [super accessibilityAttributeValue:attribute];
 }
 
 @end