[Mac] Move the large block of NSEvent forward declarations to a shared header.

chrome/browser/renderer_host/chrome_render_widget_host_view_mac_delegate.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/renderer_host/chrome_render_widget_host_view_mac_delegate.h"
 
 #include <cmath>
 
+#import "base/mac/sdk_forward_declarations.h"
 #include "base/prefs/pref_service.h"
 #include "base/strings/sys_string_conversions.h"
 #include "chrome/browser/devtools/devtools_window.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/spellchecker/spellcheck_platform_mac.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_commands.h"
 #include "chrome/browser/ui/browser_finder.h"
 #import "chrome/browser/ui/cocoa/browser_window_controller.h"
 #import "chrome/browser/ui/cocoa/history_overlay_controller.h"
 #import "chrome/browser/ui/cocoa/tab_contents/overlayable_contents_controller.h"
 #import "chrome/browser/ui/cocoa/view_id_util.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/common/spellcheck_messages.h"
 #include "chrome/common/url_constants.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/render_view_host_observer.h"
 #include "content/public/browser/render_widget_host.h"
 #include "content/public/browser/render_widget_host_view.h"
 #include "content/public/browser/web_contents.h"
 
 using content::RenderViewHost;
 
-// Declare things that are part of the 10.7 SDK.
-#if !defined(MAC_OS_X_VERSION_10_7) || \
-    MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_7
-enum {
-  NSEventPhaseNone        = 0, // event not associated with a phase.
-  NSEventPhaseBegan       = 0x1 << 0,
-  NSEventPhaseStationary  = 0x1 << 1,
-  NSEventPhaseChanged     = 0x1 << 2,
-  NSEventPhaseEnded       = 0x1 << 3,
-  NSEventPhaseCancelled   = 0x1 << 4,
-};
-typedef NSUInteger NSEventPhase;
-
-enum {
-  NSEventSwipeTrackingLockDirection = 0x1 << 0,
-  NSEventSwipeTrackingClampGestureAmount = 0x1 << 1
-};
-typedef NSUInteger NSEventSwipeTrackingOptions;
-
-@interface NSEvent (LionAPI)
-+ (BOOL)isSwipeTrackingFromScrollEventsEnabled;
-
-- (NSEventPhase)phase;
-- (CGFloat)scrollingDeltaX;
-- (CGFloat)scrollingDeltaY;
-- (void)trackSwipeEventWithOptions:(NSEventSwipeTrackingOptions)options
-          dampenAmountThresholdMin:(CGFloat)minDampenThreshold
-                               max:(CGFloat)maxDampenThreshold
-                      usingHandler:(void (^)(CGFloat gestureAmount,
-                                             NSEventPhase phase,
-                                             BOOL isComplete,
-                                             BOOL *stop))trackingHandler;
-@end
-#endif  // 10.7
-
 @interface ChromeRenderWidgetHostViewMacDelegate ()
 - (BOOL)maybeHandleHistorySwiping:(NSEvent*)theEvent;
 - (void)spellCheckEnabled:(BOOL)enabled checked:(BOOL)checked;
 @end
 
 namespace ChromeRenderWidgetHostViewMacDelegateInternal {
 
 // Filters the message sent to RenderViewHost to know if spellchecking is
 // enabled or not for the currently focused element.
 class SpellCheckRenderViewObserver : public content::RenderViewHostObserver {
@@ skipping 298 matching lines @@
 }
 
 - (void)spellCheckEnabled:(BOOL)enabled checked:(BOOL)checked {
   spellcheckEnabled_ = enabled;
   spellcheckChecked_ = checked;
 }
 
 // END Spellchecking methods
 
 @end