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

third_party/WebKit/Source/modules/payments/PaymentResponseTest.cpp

 // Copyright 2016 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 "modules/payments/PaymentResponse.h"
 
 #include <memory>
 #include <utility>
 #include "bindings/core/v8/ExceptionState.h"
 #include "bindings/core/v8/ScriptValue.h"
@@ skipping 10 matching lines @@
 namespace {
 
 class MockPaymentCompleter
     : public GarbageCollectedFinalized<MockPaymentCompleter>,
       public PaymentCompleter {
   USING_GARBAGE_COLLECTED_MIXIN(MockPaymentCompleter);
   WTF_MAKE_NONCOPYABLE(MockPaymentCompleter);
 
  public:
   MockPaymentCompleter() {
-    ON_CALL(*this, Complete(testing::_, testing::_))
-        .WillByDefault(testing::ReturnPointee(&dummy_promise_));
+    ON_CALL(*this, Complete(::testing::_, ::testing::_))
+        .WillByDefault(::testing::ReturnPointee(&dummy_promise_));
   }
 
   ~MockPaymentCompleter() override {}
 
   MOCK_METHOD2(Complete, ScriptPromise(ScriptState*, PaymentComplete result));
 
   DEFINE_INLINE_TRACE() {}
 
  private:
   ScriptPromise dummy_promise_;
@@ skipping 121 matching lines @@
       "Latn\","
       "\"organization\":\"\",\"recipient\":\"\",\"phone\":\"\"},"
       "\"shippingOption\":"
       "\"standardShippingOption\",\"payerName\":\"Jon Doe\","
       "\"payerEmail\":\"abc@gmail.com\",\"payerPhone\":\"0123\"}";
   EXPECT_EQ(expected, json_string);
 }
 
 }  // namespace
 }  // namespace blink