[Mac] Refactor the fullscreen menubar

base/mac/mac_util.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.
 
 #ifndef BASE_MAC_MAC_UTIL_H_
 #define BASE_MAC_MAC_UTIL_H_
 
 #include <Carbon/Carbon.h>
 #include <stdint.h>
 #include <string>
@@ skipping 27 matching lines @@
 BASE_EXPORT CGColorSpaceRef GetSRGBColorSpace();
 
 // Returns the generic RGB color space. The return value is a static value; do
 // not release it!
 BASE_EXPORT CGColorSpaceRef GetGenericRGBColorSpace();
 
 // Returns the color space being used by the main display.  The return value
 // is a static value; do not release it!
 BASE_EXPORT CGColorSpaceRef GetSystemColorSpace();
 
+// Returns true if both CGFloat values are equal.
+BASE_EXPORT bool IsCGFloatEqual(CGFloat a, CGFloat b);
+
 // Add a full screen request for the given |mode|.  Must be paired with a
 // ReleaseFullScreen() call for the same |mode|.  This does not by itself create
 // a fullscreen window; rather, it manages per-application state related to
 // hiding the dock and menubar.  Must be called on the main thread.
 BASE_EXPORT void RequestFullScreen(FullScreenMode mode);
 
 // Release a request for full screen mode.  Must be matched with a
 // RequestFullScreen() call for the same |mode|.  As with RequestFullScreen(),
 // this does not affect windows directly, but rather manages per-application
 // state.  For example, if there are no other outstanding
@@ skipping 111 matching lines @@
 // If any error occurs, none of the input pointers are touched.
 BASE_EXPORT bool ParseModelIdentifier(const std::string& ident,
                                       std::string* type,
                                       int32_t* major,
                                       int32_t* minor);
 
 }  // namespace mac
 }  // namespace base
 
 #endif  // BASE_MAC_MAC_UTIL_H_