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

third_party/WebKit/Source/platform/text/CharacterTest.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 "platform/text/Character.h"
 
 #include "platform/wtf/text/CharacterNames.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace blink {
 
-testing::AssertionResult IsCJKIdeographOrSymbolWithMessage(UChar32 codepoint) {
+::testing::AssertionResult IsCJKIdeographOrSymbolWithMessage(
+    UChar32 codepoint) {
   const size_t kFormatBufferSize = 10;
   char formatted_as_hex[kFormatBufferSize];
   snprintf(formatted_as_hex, kFormatBufferSize, "0x%x", codepoint);
 
   if (Character::IsCJKIdeographOrSymbol(codepoint)) {
-    return testing::AssertionSuccess()
+    return ::testing::AssertionSuccess()
            << "Codepoint " << formatted_as_hex << " is a CJKIdeographOrSymbol.";
   }
 
-  return testing::AssertionFailure() << "Codepoint " << formatted_as_hex
-                                     << " is not a CJKIdeographOrSymbol.";
+  return ::testing::AssertionFailure() << "Codepoint " << formatted_as_hex
+                                       << " is not a CJKIdeographOrSymbol.";
 }
 
 TEST(CharacterTest, HammerEmojiVsCJKIdeographOrSymbol) {
   for (UChar32 test_char = 0; test_char < kMaxCodepoint; test_char++) {
     if (Character::IsEmojiEmojiDefault(test_char)) {
       EXPECT_TRUE(IsCJKIdeographOrSymbolWithMessage(test_char));
     }
   }
 }
 
@@ skipping 265 matching lines @@
   test_char = kBase + kObjectReplacementCharacter;
   EXPECT_FALSE(Character::TreatAsZeroWidthSpaceInComplexScript(test_char));
 
   test_char = kBase + 0xA;
   EXPECT_FALSE(Character::IsNormalizedCanvasSpaceCharacter(test_char));
   test_char = kBase + 0x9;
   EXPECT_FALSE(Character::IsNormalizedCanvasSpaceCharacter(test_char));
 }
 
 }  // namespace blink