Adding unittest for blink gc dump provider.

Source/platform/heap/BlinkGCMemoryDumpProviderTest.cpp

+// Copyright 2015 The Chromium 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 "config.h"
+#include "platform/heap/BlinkGCMemoryDumpProvider.h"
+
+#include "public/platform/Platform.h"
+#include "public/platform/WebProcessMemoryDump.h"
+
+#include <gtest/gtest.h>
+
+namespace blink {
+
+TEST(BlinkGCDumpProviderTest, MemoryDump)
+{
+    WebProcessMemoryDump* dump  = Platform::current()->createProcessMemoryDump();
+    ASSERT(dump);
+    BlinkGCMemoryDumpProvider::instance()->onMemoryDump(dump);
+    ASSERT(dump->getMemoryAllocatorDump("blink_gc"));
+    ASSERT(dump->getMemoryAllocatorDump("blink_gc/allocated_objects"));
+}
+
+} // namespace blink