Add a macutil for the main app bundle and override...

base/mac_util.h

Index: base/mac_util.h
===================================================================
--- base/mac_util.h	(revision 10790)
+++ base/mac_util.h	(working copy)
@@ -6,7 +6,14 @@
 #define BASE_MAC_UTIL_H_
 
 struct FSRef;
+class FilePath;
 
+#ifdef __OBJC__
+@class NSBundle;
+#else
+class NSBundle;
+#endif
+
 #include <string>
 
 namespace mac_util {
@@ -17,6 +24,16 @@
 // Returns true if the application is running from a bundle
 bool AmIBundled();
 
+// Returns the main bundle or the override, used for code that needs
+// to fetch resources from bundles, but work within a unittest where we
+// aren't a bundle.
+NSBundle* MainAppBundle();
+
+// Set the bundle that MainAppBundle will return, overriding the default value
+// (Restore the default by calling SetOverrideAppBundle(nil)).
+void SetOverrideAppBundle(NSBundle* bundle);
+void SetOverrideAppBundlePath(const FilePath& file_path);
+
 }  // namespace mac_util
 
 #endif  // BASE_MAC_UTIL_H_