Fix logic in a CHECK(), which was missing a ! .

chrome/browser/extensions/external_pref_extension_loader.cc

Index: chrome/browser/extensions/external_pref_extension_loader.cc
diff --git a/chrome/browser/extensions/external_pref_extension_loader.cc b/chrome/browser/extensions/external_pref_extension_loader.cc
index 25ec50073d660e5c23ce79c6b8f44359a0db9b0c..a3e6bbdbe46853852ff8cf49aecee2df0e44da34 100644
--- a/chrome/browser/extensions/external_pref_extension_loader.cc
+++ b/chrome/browser/extensions/external_pref_extension_loader.cc
@@ -85,8 +85,9 @@ void ExternalPrefExtensionLoader::LoadOnFileThread() {
 
   // If we have any records to process, then we must have
   // read the .json file.  If we read the .json file, then
-  // we were able to set |base_path_|.
-  CHECK(!prefs_->empty() || !base_path_.empty());
+  // we were able to set |base_path_|.  So, prefs_ is empty,
+  // or base_path_ is not empty.
+  CHECK(prefs_->empty() || !base_path_.empty());
 
   BrowserThread::PostTask(
       BrowserThread::UI, FROM_HERE,