[mac] Implement a windowed extension install/permissions prompt.

base/mac/sdk_forward_declarations.h

 // 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.
 
 // This file contains forward declarations for items in later SDKs than the
 // default one with which Chromium is built (currently 10.6).
 // If you call any function from this header, be sure to check at runtime for
 // respondsToSelector: before calling these functions (else your code will crash
 // on older OS X versions that chrome still supports).
 
@@ skipping 13 matching lines @@
   NSEventPhaseCancelled   = 0x1 << 4,
 };
 typedef NSUInteger NSEventPhase;
 
 enum {
   NSEventSwipeTrackingLockDirection = 0x1 << 0,
   NSEventSwipeTrackingClampGestureAmount = 0x1 << 1,
 };
 typedef NSUInteger NSEventSwipeTrackingOptions;
 
+enum {
+  NSWindowAnimationBehaviorDefault = 0,
+  NSWindowAnimationBehaviorNone = 2,
+  NSWindowAnimationBehaviorDocumentWindow = 3,
+  NSWindowAnimationBehaviorUtilityWindow = 4,
+  NSWindowAnimationBehaviorAlertPanel = 5
+};
+typedef NSInteger NSWindowAnimationBehavior;
+
 @interface NSEvent (LionSDK)
 + (BOOL)isSwipeTrackingFromScrollEventsEnabled;
 
 - (NSEventPhase)phase;
 - (CGFloat)scrollingDeltaX;
 - (CGFloat)scrollingDeltaY;
 - (void)trackSwipeEventWithOptions:(NSEventSwipeTrackingOptions)options
           dampenAmountThresholdMin:(CGFloat)minDampenThreshold
                                max:(CGFloat)maxDampenThreshold
                       usingHandler:(void (^)(CGFloat gestureAmount,
@@ skipping 10 matching lines @@
 - (void)setContentsScale:(CGFloat)contentsScale;
 @end
 
 @interface NSScreen (LionSDK)
 - (CGFloat)backingScaleFactor;
 - (NSRect)convertRectToBacking:(NSRect)aRect;
 @end
 
 @interface NSWindow (LionSDK)
 - (CGFloat)backingScaleFactor;
+- (NSWindowAnimationBehavior)animationBehavior;
+- (void)setAnimationBehavior:(NSWindowAnimationBehavior)newAnimationBehavior;
 @end
 #endif  // MAC_OS_X_VERSION_10_7
 
 #endif  // BASE_MAC_SDK_FORWARD_DECLARATIONS_H_