Fix more warnings on linux

Source/core/platform/animation/TimingFunction.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 256 matching lines @@
     {
         double max = m_segments.isEmpty() ? 0 : m_segments.last().max();
         ASSERT(upperBound > max);
         m_segments.append(Segment(max, upperBound, timingFunction));
     }
     virtual double evaluate(double fraction, double accuracy) const
     {
         RELEASE_ASSERT_WITH_MESSAGE(fraction >= 0 && fraction <= 1, "Web Animations not yet implemented: Timing function behavior outside the range [0, 1] is not yet specified");
         ASSERT(!m_segments.isEmpty());
         ASSERT(m_segments.last().max() == 1);
-        const Segment* segment;
+        const Segment* segment = 0;

[Inactive, 2013/10/29 13:56:20]

Maybe we could rewrite this so that it looks less dangerous:
ASSERT(!m_segments.isEmpty());
ASSERT(m_segments.last().max() == 1);
size_t i = 0;
const Segment* segment = &m_segments[i++];
while (fraction >= segment->max() && i < m_segments.size())
    segment = &m_segments[i++];
return segment->evaluate(fraction, accuracy);

         for (size_t i = 0; i < m_segments.size(); ++i) {
             segment = &m_segments[i];
             if (fraction < segment->max())
                 break;
         }
         return segment->evaluate(fraction, accuracy);
     }
 
     virtual bool operator==(const TimingFunction& other) const
     {
@@ skipping 31 matching lines @@
     {
         ASSERT(RuntimeEnabledFeatures::webAnimationsEnabled());
     }
 
     Vector<Segment> m_segments;
 };
 
 } // namespace WebCore
 
 #endif // TimingFunction_h