Revert of Revert "Post loading tasks on the appropriate WebFrameScheduler's queue."

third_party/WebKit/Source/core/fetch/ResourceFetcher.cpp

Index: third_party/WebKit/Source/core/fetch/ResourceFetcher.cpp
diff --git a/third_party/WebKit/Source/core/fetch/ResourceFetcher.cpp b/third_party/WebKit/Source/core/fetch/ResourceFetcher.cpp
index d9019762777a49e857d2937080af565f798bed98..09a67634939a20b81c887427d9051c85f8fe3d65 100644
--- a/third_party/WebKit/Source/core/fetch/ResourceFetcher.cpp
+++ b/third_party/WebKit/Source/core/fetch/ResourceFetcher.cpp
@@ -189,6 +189,14 @@
 #endif
 }
 
+WebTaskRunner* ResourceFetcher::loadingTaskRunner()
+{
+    if (!m_context)
+        return nullptr;
+
+    return m_context->loadingTaskRunner();
+}
+
 Resource* ResourceFetcher::cachedResource(const KURL& resourceURL) const
 {
     KURL url = MemoryCache::removeFragmentIdentifierIfNeeded(resourceURL);