Fix several problems with the content verification code

extensions/browser/content_verify_job.h

Index: extensions/browser/content_verify_job.h
diff --git a/extensions/browser/content_verify_job.h b/extensions/browser/content_verify_job.h
index 11660f3b3af81d1ead060dac09d4fdc2caed273c..5a57c6eaf8b7b7358c4a94046cc74da61f4ffaa0 100644
--- a/extensions/browser/content_verify_job.h
+++ b/extensions/browser/content_verify_job.h
@@ -34,8 +34,12 @@ class ContentVerifyJob : public base::RefCountedThreadSafe<ContentVerifyJob> {
     // No failure.
     NONE,
 
-    // Failed because there were no expected hashes.
-    NO_HASHES,
+    // Failed because there were no expected hashes at all (eg they haven't
+    // been fetched yet).
+    MISSING_ALL_HASHES,
+
+    // Failed because this file wasn't found in the list of expected hashes.
+    NO_HASHES_FOR_FILE,
 
     // Some of the content read did not match the expected hash.
     HASH_MISMATCH