Switch to direct observation of fullscreen after r174754.

chrome/browser/fullscreen_mac.mm

 // Copyright (c) 2011 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/fullscreen.h"
 
 #import <Cocoa/Cocoa.h>
 
 #import "base/logging.h"
-#import "third_party/GTM/Foundation/GTMNSObject+KeyValueObserving.h"
 
 // Replicate specific 10.7 SDK declarations for building with prior SDKs.
 #if !defined(MAC_OS_X_VERSION_10_7) || \
     MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_7
 
 enum {
   NSApplicationPresentationFullScreen = 1 << 10
 };
 
 #endif  // MAC_OS_X_VERSION_10_7
@@ skipping 26 matching lines @@
 @property (nonatomic, getter=isFullScreen) BOOL fullScreen;
 
 @end
 
 @implementation FullScreenMonitor
 
 @synthesize fullScreen = fullScreen_;
 
 - (id)init {
   if ((self = [super init])) {
-    [NSApp gtm_addObserver:self
-                forKeyPath:@"currentSystemPresentationOptions"
-                  selector:@selector(observeNotification:)
-                  userInfo:nil
-                   options:NSKeyValueObservingOptionNew |
-                           NSKeyValueObservingOptionInitial];
+    [NSApp addObserver:self
+            forKeyPath:@"currentSystemPresentationOptions"
+               options:NSKeyValueObservingOptionNew |
+                       NSKeyValueObservingOptionInitial
+               context:nil];
   }
   return self;
 }
 
 - (void)dealloc {
-  [NSApp gtm_removeObserver:self
-                 forKeyPath:@"currentSystemPresentationOptions"
-                   selector:@selector(observeNotification:)];
+  [NSApp removeObserver:self
+             forKeyPath:@"currentSystemPresentationOptions"];
   [super dealloc];
 }
 
-- (void)observeNotification:(GTMKeyValueChangeNotification*)notification {
-  NSDictionary* change = [notification change];
+- (void)observeValueForKeyPath:(NSString*)keyPath
+                      ofObject:(id)object
+                        change:(NSDictionary*)change
+                       context:(void*)context {
   NSApplicationPresentationOptions options =
       [[change objectForKey:NSKeyValueChangeNewKey] integerValue];
   [self setFullScreen:AreOptionsFullScreen(options)];
 }
 
 @end
 
 static FullScreenMonitor* g_fullScreenMonitor = nil;
 
 void InitFullScreenMonitor() {
   if (!g_fullScreenMonitor)
     g_fullScreenMonitor = [[FullScreenMonitor alloc] init];
 }
 
 void StopFullScreenMonitor() {
   [g_fullScreenMonitor release];
   g_fullScreenMonitor = nil;
 }
 
 bool IsFullScreenMode() {
   // Check if the main display has been captured (by games in particular).
   if (CGDisplayIsCaptured(CGMainDisplayID()))
     return true;
 
   return [g_fullScreenMonitor isFullScreen];
 }