Mac: reform our shutdown routine.

Make shutdown be more like other platforms. Moreover:
- Cancelling quit from an onbeforeunload dialog shouldn't mess up the browser.
- Having quit cancelled due to a window pop up on the closure of another window
  shouldn't break the browser. [With this patch, it will result in the browser
  being in a quirky state in which the closure of the last browser window will
  cause a quit. But the browser won't be broken.]

BUG=34384,37813,37927
TEST=See bugs.

Review URL: http://codereview.chromium.org/1520006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@44096 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 16 insertions, 0 deletions

diff --git a/chrome/browser/browser_shutdown.h b/chrome/browser/browser_shutdown.h
index 49d800f..3ab2c2e 100644
--- a/chrome/browser/browser_shutdown.h
+++ b/chrome/browser/browser_shutdown.h
@@ -44,6 +44,22 @@ void Shutdown();
 // Called at startup to create a histogram from our previous shutdown time.
 void ReadLastShutdownInfo();
 
+#if defined(OS_MACOSX)
+// On Mac, closing the last window does not automatically quit the application.
+// To actually quit, set a flag which makes final window closure trigger a quit.
+// If the quit is aborted, then the flag should be reset (but see notes below on
+// the proper way to do this, i.e., usually not using |SetTryingToQuit()|).
+
+// This is a low-level mutator; in general, don't call it, except from
+// appropriate places in the app controller. To quit, use usual means, e.g.,
+// using |chrome_browser_application_mac::Terminate()|. To stop quitting, use
+// |chrome_browser_application_mac::CancelTerminate()|.
+void SetTryingToQuit(bool quitting);
+
+// General accessor.
+bool IsTryingToQuit();
+#endif  // OS_MACOSX
+
 }  // namespace browser_shutdown
 
 #endif  // CHROME_BROWSER_BROWSER_SHUTDOWN_H__