cc: Use correct message loop proxy in BlockingTaskRunner

cc/layers/delegated_frame_resource_collection_unittest.cc

Index: cc/layers/delegated_frame_resource_collection_unittest.cc
diff --git a/cc/layers/delegated_frame_resource_collection_unittest.cc b/cc/layers/delegated_frame_resource_collection_unittest.cc
index 9f131dfbf4375b029e4347b372ab2546ae7473b7..2a9f29f3ef31cea93793d6825810407bafa18344 100644
--- a/cc/layers/delegated_frame_resource_collection_unittest.cc
+++ b/cc/layers/delegated_frame_resource_collection_unittest.cc
@@ -9,6 +9,7 @@
 #include "cc/layers/delegated_frame_resource_collection.h"
 #include "cc/resources/returned_resource.h"
 #include "cc/resources/transferable_resource.h"
+#include "cc/trees/blocking_task_runner.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace cc {
@@ -78,10 +79,12 @@ TEST_F(DelegatedFrameResourceCollectionTest, NoRef) {
   EXPECT_TRUE(resource_collection_->HasOneRef());
 }
 
-void ReturnResourcesOnThread(ReturnCallback callback,
-                             const ReturnedResourceArray& resources,
-                             base::WaitableEvent* event) {
-  callback.Run(resources);
+void ReturnResourcesOnThread(
+    ReturnCallback callback,
+    const ReturnedResourceArray& resources,
+    base::WaitableEvent* event,
+    scoped_refptr<BlockingTaskRunner> main_thread_task_runner) {
+  callback.Run(resources, main_thread_task_runner);
   if (event)
     event->Wait();
 }
@@ -92,6 +95,8 @@ void ReturnResourcesOnThread(ReturnCallback callback,
 TEST_F(DelegatedFrameResourceCollectionTest, Thread) {
   base::Thread thread("test thread");
   thread.Start();
+  scoped_refptr<BlockingTaskRunner> main_thread_task_runner(
+      BlockingTaskRunner::Create(base::MessageLoopProxy::current()));
 
   TransferableResourceArray resources = CreateResourceArray();
   resource_collection_->ReceivedResources(resources);
@@ -112,7 +117,8 @@ TEST_F(DelegatedFrameResourceCollectionTest, Thread) {
             &ReturnResourcesOnThread,
             resource_collection_->GetReturnResourcesCallbackForImplThread(),
             returned_resources,
-            &event));
+            &event,
+            main_thread_task_runner));
 
     run_loop.Run();
   }
@@ -151,7 +157,8 @@ TEST_F(DelegatedFrameResourceCollectionTest, Thread) {
                                   base::Bind(&ReturnResourcesOnThread,
                                              return_callback,
                                              returned_resources,
-                                             null_event));
+                                             null_event,
+                                             main_thread_task_runner));
 
   thread.Stop();
 }