Let the second pass phantom callbacks run in a separate task on the foreground thread.

test/unittests/test-utils.cc

 // Copyright 2014 the V8 project 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 "test/unittests/test-utils.h"
 
+#include "include/libplatform/libplatform.h"
 #include "src/base/platform/time.h"
 #include "src/debug.h"
 #include "src/flags.h"
 #include "src/isolate.h"
+#include "src/v8.h"
 
 namespace v8 {
 
 class ArrayBufferAllocator : public v8::ArrayBuffer::Allocator {
  public:
   virtual void* Allocate(size_t length) {
     void* data = AllocateUninitialized(length);
     return data == NULL ? data : memset(data, 0, length);
   }
   virtual void* AllocateUninitialized(size_t length) { return malloc(length); }
@@ skipping 23 matching lines @@
   array_buffer_allocator_ = new ArrayBufferAllocator;
   create_params.array_buffer_allocator = array_buffer_allocator_;
   isolate_ = v8::Isolate::New(create_params);
   EXPECT_TRUE(isolate_ != NULL);
 }
 
 
 // static
 void TestWithIsolate::TearDownTestCase() {
   ASSERT_TRUE(isolate_ != NULL);
+  v8::Platform* platform = internal::V8::GetCurrentPlatform();
+  ASSERT_TRUE(platform != NULL);
+  while (platform::PumpMessageLoop(platform, isolate_)) continue;
   isolate_->Dispose();
   isolate_ = NULL;
   delete array_buffer_allocator_;
   Test::TearDownTestCase();
 }
 
 
 TestWithContext::TestWithContext()
     : context_(Context::New(isolate())), context_scope_(context_) {}
 
@@ skipping 30 matching lines @@
 
 base::RandomNumberGenerator* TestWithIsolate::random_number_generator() const {
   return isolate()->random_number_generator();
 }
 
 
 TestWithZone::~TestWithZone() {}
 
 }  // namespace internal
 }  // namespace v8