Rename WebCore namespace to blink in bindings and web

Source/bindings/core/v8/Nullable.h

 // Copyright 2014 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.
 
 #ifndef Nullable_h
 #define Nullable_h
 
 #include "wtf/Assertions.h"
 
-namespace WebCore {
+namespace blink {
 
 template <typename T>
 class Nullable {
 public:
     Nullable()
         : m_value()
         , m_isNull(true) { }
 
     Nullable(const T& value)
         : m_value(value)
@@ skipping 18 matching lines @@
     bool operator==(const Nullable& other) const
     {
         return (m_isNull && other.m_isNull) || (!m_isNull && !other.m_isNull && m_value == other.m_value);
     }
 
 private:
     T m_value;
     bool m_isNull;
 };
 
-} // namespace WebCore
+} // namespace blink
 
 #endif // Nullable_h