Added unpacking step

chrome/installer/mac/app/OmahaXMLParser.m

Index: chrome/installer/mac/app/OmahaXMLParser.m
diff --git a/chrome/installer/mac/app/OmahaXMLParser.m b/chrome/installer/mac/app/OmahaXMLParser.m
index d1a0a1d9101765e43c86c1e3ef5662031f390a06..fa901b2eb3a0f40b74dc4eb9903e6fc96be17c81 100644
--- a/chrome/installer/mac/app/OmahaXMLParser.m
+++ b/chrome/installer/mac/app/OmahaXMLParser.m
@@ -21,8 +21,6 @@
   [parser setDelegate:omahaParser];
   if (![parser parse]) {
     *error = [parser parserError];
-    // TODO: pass up error object to indicate error occurred so
-    // InstallerWindowController can create custom user error message.
     return nil;
   }
 
@@ -34,6 +32,9 @@
   }
 
   if ([completeDownloadURLs count] < 1) {
+    // TODO: currently whatever error is passed in doesn't matter... we should
+    // make it so that the type of error informs what the installer will do
+    // about the error
     *error = [NSError errorWithDomain:@"ChromeErrorDomain" code:1 userInfo:nil];
     return nil;
   }