Add assertion on initialization sequence.

The order at which to call the controller methods is:
1) Any method that change the configuration_ field
2) start
3) Any other method

 This change adds assertion that it is done correctly.
Review URL: https://breakpad.appspot.com/499003

git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@1085 4c0a9323-5329-0410-9bdc-e9ce6186880e

src/client/ios/BreakpadController.h

@@ -55,6 +55,10 @@
   // Whether or not crash reports should be uploaded.
   BOOL enableUploads_;
 
+  // Whether the controller has been started on the main thread. This is only
+  // used to assert the initialization order is correct.
+  BOOL started_;
+
   // The interval to wait between two uploads. Value is 0 if no upload must be
   // done.
   int uploadIntervalInSeconds_;