Make classes and structures in core/style, core/plugins and core/streams fast-allocated.

Source/core/style/StyleMotionData.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 StyleMotionData_h
 #define StyleMotionData_h
 
 #include "core/style/ComputedStyleConstants.h"
 #include "core/style/StyleMotionPath.h"
 #include "platform/Length.h"
+#include "wtf/Allocator.h"
 
 namespace blink {
 
 class StyleMotionData {
+    DISALLOW_ALLOCATION();
 public:
     StyleMotionData(StyleMotionPath* path, const Length& offset, float rotation, MotionRotationType rotationType)
         : m_path(path)
         , m_offset(offset)
         , m_rotation(rotation)
         , m_rotationType(rotationType)
     {
     }
 
     bool operator==(const StyleMotionData&) const;
 
     bool operator!=(const StyleMotionData& o) const { return !(*this == o); }
 
     // Must be public for SET_VAR in ComputedStyle.h
     RefPtr<StyleMotionPath> m_path; // nullptr indicates path is 'none'
     Length m_offset;
     float m_rotation;
     MotionRotationType m_rotationType;
 };
 
 } // namespace blink
 
 #endif // StyleMotionData_h