Removing duplicate 'using namespace blink;' in platform and web

Source/web/tests/KeyboardTest.cpp

 /*
  * Copyright (C) 2010 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 24 matching lines @@
 #include "core/editing/EditingBehavior.h"
 #include "core/editing/Editor.h"
 #include "core/events/EventTarget.h"
 #include "core/events/KeyboardEvent.h"
 #include "core/frame/Settings.h"
 #include "platform/KeyboardCodes.h"
 #include "public/web/WebInputEvent.h"
 #include "web/WebInputEventConversion.h"
 
 using namespace blink;
-using namespace blink;
 
 namespace {
 
 class KeyboardTest : public testing::Test {
 public:
 
     // Pass a WebKeyboardEvent into the EditorClient and get back the string
     // name of which editing event that key causes.
     // E.g., sending in the enter key gives back "InsertNewline".
     const char* interpretKeyEvent(
@@ skipping 151 matching lines @@
 }
 
 TEST_F(KeyboardTest, TestInsertNewline4)
 {
     int modifiers = WebInputEvent::AltKey | WebInputEvent::ShiftKey;
     const char* result = interpretNewLine(modifiers);
     EXPECT_STREQ("InsertNewline", result);
 }
 
 } // empty namespace