[Mac] Remove kPulseBookmarkButtonNotification.

chrome/browser/ui/cocoa/bookmarks/bookmark_button.mm

Index: chrome/browser/ui/cocoa/bookmarks/bookmark_button.mm
diff --git a/chrome/browser/ui/cocoa/bookmarks/bookmark_button.mm b/chrome/browser/ui/cocoa/bookmarks/bookmark_button.mm
index 2dd4798ca2cc2787c282291401c3df2f506d4a42..bb689e5d4f5d82c47e4a17dac17b922fa5641bf4 100644
--- a/chrome/browser/ui/cocoa/bookmarks/bookmark_button.mm
+++ b/chrome/browser/ui/cocoa/bookmarks/bookmark_button.mm
@@ -24,15 +24,6 @@ using bookmarks::BookmarkNode;
 // The opacity of the bookmark button drag image.
 static const CGFloat kDragImageOpacity = 0.7;
 
-namespace bookmark_button {
-
-NSString* const kPulseBookmarkButtonNotification =
-    @"PulseBookmarkButtonNotification";
-NSString* const kBookmarkKey = @"BookmarkKey";
-NSString* const kBookmarkPulseFlagKey = @"BookmarkPulseFlagKey";
-
-};
-
 namespace {
 // We need a class variable to track the current dragged button to enable
 // proper live animated dragging behavior, and can't do it in the