Consolidate SDK forwards in sdk_forward_declarations.h.

chrome/browser/ui/cocoa/apps/native_app_window_cocoa_browsertest.mm

Index: chrome/browser/ui/cocoa/apps/native_app_window_cocoa_browsertest.mm
diff --git a/chrome/browser/ui/cocoa/apps/native_app_window_cocoa_browsertest.mm b/chrome/browser/ui/cocoa/apps/native_app_window_cocoa_browsertest.mm
index cc9d793999e93844c5b7e4651f1ac6e1d29b8b3c..66edc3894c2edf70f9000ddfc7d65be9cc50d72b 100644
--- a/chrome/browser/ui/cocoa/apps/native_app_window_cocoa_browsertest.mm
+++ b/chrome/browser/ui/cocoa/apps/native_app_window_cocoa_browsertest.mm
@@ -8,6 +8,7 @@
 
 #include "apps/app_window_registry.h"
 #include "base/mac/mac_util.h"
+#include "base/mac/sdk_forward_declarations.h"
 #include "chrome/browser/apps/app_browsertest_util.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/extensions/application_launch.h"
@@ -119,15 +120,6 @@ IN_PROC_BROWSER_TEST_F(NativeAppWindowCocoaBrowserTest, HideShowWithApp) {
 #if !defined(MAC_OS_X_VERSION_10_7) || \
     MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_7
 
-@interface NSWindow (LionSDKDeclarations)
-- (void)toggleFullScreen:(id)sender;
-@end
-
-enum {
-  NSWindowCollectionBehaviorFullScreenPrimary = 1 << 7,
-  NSFullScreenWindowMask = 1 << 14
-};
-
 NSString* const NSWindowDidEnterFullScreenNotification =
     @"NSWindowDidEnterFullScreenNotification";
 NSString* const NSWindowDidExitFullScreenNotification =