Be explicit about namespace testing to not mix it with blink::testing

third_party/WebKit/Source/platform/PODFreeListArenaTest.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 36 matching lines @@
   TestClass2() : padding(0) {
     static int test_ids = 0;
     id = test_ids++;
   }
   int id;
   int padding;
 };
 
 }  // anonymous namespace
 
-class PODFreeListArenaTest : public testing::Test {
+class PODFreeListArenaTest : public ::testing::Test {
  protected:
   int GetFreeListSize(PassRefPtr<PODFreeListArena<TestClass1>> arena) const {
     return arena->GetFreeListSizeForTesting();
   }
 };
 
 // Make sure the arena can successfully allocate from more than one
 // region.
 TEST_F(PODFreeListArenaTest, CanAllocateFromMoreThanOneRegion) {
   RefPtr<TrackedAllocator> allocator = TrackedAllocator::Create();
@@ skipping 89 matching lines @@
   }
   for (int i = 0; i < 100; i++) {
     TestClass2* cur = arena->AllocateObject();
     EXPECT_TRUE(objects.find(cur) != objects.end());
     EXPECT_TRUE(cur->id >= 100 && cur->id < 200);
     objects.erase(cur);
   }
 }
 
 }  // namespace blink