Fix relaunches on the Mac

base/mac/mac_util.h

 // Copyright (c) 2011 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_
 #pragma once
 
 #include <AvailabilityMacros.h>
 #include <Carbon/Carbon.h>
@@ skipping 60 matching lines @@
 
 // Set the visibility of the cursor.
 void SetCursorVisibility(bool visible);
 
 // Should windows miniaturize on a double-click (on the title bar)?
 bool ShouldWindowsMiniaturizeOnDoubleClick();
 
 // Activates the process with the given PID.
 void ActivateProcess(pid_t pid);
 
+// Returns true if this process is in the foreground, meaning that it's the
+// frontmost process, the one whose menu bar is shown at the top of the main
+// display.
+bool AmIForeground();
+
 // Excludes the file given by |file_path| from being backed up by Time Machine.
 bool SetFileBackupExclusion(const FilePath& file_path);
 
 // Sets the process name as displayed in Activity Monitor to process_name.
 void SetProcessName(CFStringRef process_name);
 
 // Converts a NSImage to a CGImageRef.  Normally, the system frameworks can do
 // this fine, especially on 10.6.  On 10.5, however, CGImage cannot handle
 // converting a PDF-backed NSImage into a CGImageRef.  This function will
 // rasterize the PDF into a bitmap CGImage.  The caller is responsible for
@@ skipping 68 matching lines @@
     MAC_OS_X_VERSION_MIN_REQUIRED > MAC_OS_X_VERSION_10_7
 #define BASE_MAC_MAC_UTIL_H_INLINED_GT_10_7
 inline bool IsOSLion() { return false; }
 inline bool IsOSLaterThanLion() { return true; }
 #endif
 
 }  // namespace mac
 }  // namespace base
 
 #endif  // BASE_MAC_MAC_UTIL_H_