Consolidate SDK forwards in sdk_forward_declarations.h.

chrome/browser/ui/cocoa/nsview_additions.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.
 
 #include "base/command_line.h"
 #include "base/mac/mac_util.h"
+#include "base/mac/sdk_forward_declarations.h"
 #import "chrome/browser/ui/cocoa/nsview_additions.h"
 #include "chrome/common/chrome_switches.h"
 #include "ui/base/ui_base_switches.h"
 #include "ui/gfx/scoped_ns_graphics_context_save_gstate_mac.h"
 
 #include "base/logging.h"
 
-#if !defined(MAC_OS_X_VERSION_10_7) || \
-    MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_7
-
-@interface NSView (LionAPI)
-- (NSSize)convertSizeFromBacking:(NSSize)size;
-@end
-
-#endif  // 10.7
-
-// Replicate specific 10.9 SDK declarations for building with prior SDKs.
-#if !defined(MAC_OS_X_VERSION_10_9) || \
-    MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_9
-
-@interface NSView (MavericksAPI)
-// Flatten all child views that did not call setWantsLayer:YES into this
-// view's CALayer.
-- (void)setCanDrawSubviewsIntoLayer:(BOOL)flag;
-@end
-
-#endif  // MAC_OS_X_VERSION_10_9
-
 @implementation NSView (ChromeAdditions)
 
 - (CGFloat)cr_lineWidth {
   // All shipping retina macs run at least 10.7.
   if (![self respondsToSelector:@selector(convertSizeFromBacking:)])
     return 1;
   return [self convertSizeFromBacking:NSMakeSize(1, 1)].width;
 }
 
 - (BOOL)cr_isMouseInView {
@@ skipping 84 matching lines @@
 }
 
 - (NSView*)cr_viewBeingDrawnTo {
   if (!g_ancestorBeingDrawnFrom)
     return self;
   DCHECK(g_ancestorBeingDrawnFrom == self);
   return g_childBeingDrawnTo;
 }
 
 @end