mac: Remove IsOSLion().

chrome/browser/ui/cocoa/base_bubble_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/base_bubble_controller.h"
 
 #include "base/logging.h"
 #include "base/mac/bundle_locations.h"
 #include "base/mac/foundation_util.h"
 #include "base/mac/mac_util.h"
@@ skipping 329 matching lines @@
 }
 
 // Since the bubble shares first responder with its parent window, set event
 // handlers to dismiss the bubble when it would normally lose key state.
 // Events on sheets are ignored: this assumes the sheet belongs to the bubble
 // since, to affect a sheet on a different window, the bubble would also lose
 // key status in -[NSWindowDelegate windowDidResignKey:]. This keeps the logic
 // simple, since -[NSWindow attachedSheet] returns nil while the sheet is still
 // closing.
 - (void)registerKeyStateEventTap {
-  // Parent key state sharing is only avaiable on 10.7+.
-  if (!base::mac::IsOSLionOrLater())
-    return;
-
   NSWindow* window = self.window;
   NSNotification* note =
       [NSNotification notificationWithName:NSWindowDidResignKeyNotification
                                     object:window];
 
   // The eventTap_ catches clicks within the application that are outside the
   // window.
   eventTap_ = [NSEvent
       addLocalMonitorForEventsMatchingMask:NSLeftMouseDownMask |
                                            NSRightMouseDownMask
@@ skipping 84 matching lines @@
 
 - (void)activateTabWithContents:(content::WebContents*)newContents
                previousContents:(content::WebContents*)oldContents
                         atIndex:(NSInteger)index
                          reason:(int)reason {
   // The user switched tabs; close.
   [self closeBubble];
 }
 
 @end  // BaseBubbleController