Bug 689008: Part 2 - Fix the cache issue; r=michal

netwerk/protocol/http/nsHttpChannel.cpp

@@ -4298,8 +4298,26 @@ nsHttpChannel::OnStopRequest(nsIRequest *request, nsISupports *ctxt, nsresult st
         mListenerContext = 0;
     }
 
-    if (mCacheEntry)
+    if (mCacheEntry) {
+        bool asFile = false;
+        if (mInitedCacheEntry && !mCachedContentIsPartial &&
+            (NS_SUCCEEDED(mStatus) || contentComplete) &&
+            (mCacheAccess & nsICache::ACCESS_WRITE) &&
+            NS_SUCCEEDED(GetCacheAsFile(&asFile)) && asFile) {
+            // We can allow others access to the cache entry
+            // because we don't write to the cache anymore.
+            // CloseCacheEntry may not actually close the cache
+            // entry immediately because someone (such as XHR2
+            // blob response) may hold the token to the cache
+            // entry. So we mark the cache valid here.
+            // We also need to check the entry is stored as file
+            // because we write to the cache asynchronously when
+            // it isn't stored in the file and it isn't completely
+            // written to the disk yet.
+            mCacheEntry->MarkValid();
+        }
         CloseCacheEntry(!contentComplete);
+    }
 
     if (mOfflineCacheEntry)
         CloseOfflineCacheEntry();