Content verification: Don't fail on non-existence.

extensions/browser/content_verify_job.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "extensions/browser/content_verify_job.h"
 
 #include <algorithm>
 
 #include "base/metrics/histogram.h"
 #include "base/stl_util.h"
@@ skipping 134 matching lines @@
   const std::string* expected_hash = NULL;
   if (!hash_reader_->GetHashForBlock(block, &expected_hash) ||
       *expected_hash != final)
     return false;
 
   return true;
 }
 
 void ContentVerifyJob::OnHashesReady(bool success) {
   if (!success && !g_test_delegate) {
-    if (hash_reader_->have_verified_contents() &&
-        hash_reader_->have_computed_hashes())
+    if (!hash_reader_->content_exists()) {
+      // Ignore verification of non-existent resources.
+      return;
+    } else if (hash_reader_->have_verified_contents() &&
+               hash_reader_->have_computed_hashes()) {
       DispatchFailureCallback(NO_HASHES_FOR_FILE);
-    else
+    } else {
       DispatchFailureCallback(MISSING_ALL_HASHES);
+    }
     return;
   }
 
   hashes_ready_ = true;
   if (!queue_.empty()) {
     std::string tmp;
     queue_.swap(tmp);
     BytesRead(tmp.size(), string_as_array(&tmp));
   }
   if (done_reading_) {
@@ skipping 14 matching lines @@
   if (!failure_callback_.is_null()) {
     VLOG(1) << "job failed for " << hash_reader_->extension_id() << " "
             << hash_reader_->relative_path().MaybeAsASCII()
             << " reason:" << reason;
     failure_callback_.Run(reason);
     failure_callback_.Reset();
   }
 }
 
 }  // namespace extensions