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

content/child/blink_platform_impl.cc

Index: content/child/blink_platform_impl.cc
diff --git a/content/child/blink_platform_impl.cc b/content/child/blink_platform_impl.cc
index 3b26b612632bf59a2e29c8cd9799d80724343e73..c8f41688a6fb8017f9075e160af300c0d5673640 100644
--- a/content/child/blink_platform_impl.cc
+++ b/content/child/blink_platform_impl.cc
@@ -34,7 +34,6 @@
 #include "blink/public/resources/grit/blink_image_resources.h"
 #include "blink/public/resources/grit/blink_resources.h"
 #include "components/mime_util/mime_util.h"
-#include "components/scheduler/child/web_task_runner_impl.h"
 #include "components/scheduler/child/webthread_impl_for_worker_scheduler.h"
 #include "content/app/resources/grit/content_resources.h"
 #include "content/app/strings/grit/content_strings.h"
@@ -479,8 +478,7 @@ WebURLLoader* BlinkPlatformImpl::createURLLoader() {
   // data URLs to bypass the ResourceDispatcher.
   return new WebURLLoaderImpl(
       child_thread ? child_thread->resource_dispatcher() : NULL,
-      make_scoped_ptr(new scheduler::WebTaskRunnerImpl(
-            base::ThreadTaskRunnerHandle::Get())));
+      MainTaskRunnerForCurrentThread());
 }
 
 blink::WebSocketHandle* BlinkPlatformImpl::createWebSocketHandle() {
@@ -1365,6 +1363,16 @@ uint32_t BlinkPlatformImpl::getUniqueIdForProcess() {
   return base::trace_event::TraceLog::GetInstance()->process_id();
 }
 
+scoped_refptr<base::SingleThreadTaskRunner>
+BlinkPlatformImpl::MainTaskRunnerForCurrentThread() {
+  if (main_thread_task_runner_.get() &&
+      main_thread_task_runner_->BelongsToCurrentThread()) {
+    return main_thread_task_runner_;
+  } else {
+    return base::ThreadTaskRunnerHandle::Get();
+  }
+}
+
 bool BlinkPlatformImpl::IsMainThread() const {
   return main_thread_task_runner_.get() &&
          main_thread_task_runner_->BelongsToCurrentThread();