Alternate NTP Mac: Show overlay at fixed position

chrome/browser/ui/cocoa/tab_contents/overlay_separator_view.mm

Index: chrome/browser/ui/cocoa/tab_contents/overlay_separator_view.mm
diff --git a/chrome/browser/ui/cocoa/tab_contents/overlay_drop_shadow_view.mm b/chrome/browser/ui/cocoa/tab_contents/overlay_separator_view.mm
similarity index 64%
rename from chrome/browser/ui/cocoa/tab_contents/overlay_drop_shadow_view.mm
rename to chrome/browser/ui/cocoa/tab_contents/overlay_separator_view.mm
index b3b92ef3ad3ea9c8a29c103b1d2da0a92d04a824..35509b24dff5ea2c332df2ff691a97930f0b5c3d 100644
--- a/chrome/browser/ui/cocoa/tab_contents/overlay_drop_shadow_view.mm
+++ b/chrome/browser/ui/cocoa/tab_contents/overlay_separator_view.mm
@@ -2,12 +2,28 @@
 // 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/tab_contents/overlay_drop_shadow_view.h"
+#import "chrome/browser/ui/cocoa/tab_contents/overlay_separator_view.h"
 
+#import "chrome/browser/ui/cocoa/nsview_additions.h"
 #include "grit/theme_resources.h"
 #include "ui/base/resource/resource_bundle.h"
 
-@implementation OverlayDropShadowView
+@implementation OverlayTopSeparatorView
+
++ (CGFloat)preferredHeight {
+  return 1;
+}
+
+- (void)drawRect:(NSRect)rect {
+  NSRect separatorRect = [self bounds];
+  separatorRect.size.height = [self cr_lineWidth];
+  [[self strokeColor] set];
+  NSRectFillUsingOperation(separatorRect, NSCompositeSourceOver);
+}
+
+@end
+
+@implementation OverlayBottomSeparatorView
 
 + (CGFloat)preferredHeight {
   ResourceBundle& rb = ResourceBundle::GetSharedInstance();