Oilpan: Fix the CSSKeyframesRule destructor.

The m_childRuleCSSOMWrappers vector is in the heap and we should not
touch it. Not even to get its size.

R=haraken@chromium.org, kouhei@chromium.org, wibling@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/183833017

git-svn-id: svn://svn.chromium.org/blink/trunk@168373 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/Source/core/css/CSSKeyframesRule.cpp

@@ -96,9 +96,8 @@ CSSKeyframesRule::CSSKeyframesRule(StyleRuleKeyframes* keyframesRule, CSSStyleSh
 
 CSSKeyframesRule::~CSSKeyframesRule()
 {
-    ASSERT(m_childRuleCSSOMWrappers.size() == m_keyframesRule->keyframes().size());
-
 #if !ENABLE(OILPAN)
+    ASSERT(m_childRuleCSSOMWrappers.size() == m_keyframesRule->keyframes().size());
     for (unsigned i = 0; i < m_childRuleCSSOMWrappers.size(); ++i) {
         if (m_childRuleCSSOMWrappers[i])
             m_childRuleCSSOMWrappers[i]->setParentRule(0);