Add the concept of browse extent.

BUG=46636

Review URL: http://codereview.chromium.org/2862034

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@51327 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/extensions/extensions_service.cc b/chrome/browser/extensions/extensions_service.cc
index 6518b6f..81c56f3 100644
--- a/chrome/browser/extensions/extensions_service.cc
+++ b/chrome/browser/extensions/extensions_service.cc
@@ -455,7 +455,7 @@
             *static_cast<DictionaryValue*>(manifest.get()),
             true,  // require key
             &error)) {
-      NOTREACHED();
+      NOTREACHED() << error;
       return;
     }