Fix trailing whitespace in .cpp, .h, and .idl files

Source/core/css/CSSRuleList.cpp

Index: Source/core/css/CSSRuleList.cpp
diff --git a/Source/core/css/CSSRuleList.cpp b/Source/core/css/CSSRuleList.cpp
index 51accdc5dc94465f3d40e8a5212bc2beb7055538..499518bde5d45da3b6ce26c1cbaffecb21fad241 100644
--- a/Source/core/css/CSSRuleList.cpp
+++ b/Source/core/css/CSSRuleList.cpp
@@ -34,9 +34,9 @@ CSSRuleList::~CSSRuleList()
 {
 }
 
-StaticCSSRuleList::StaticCSSRuleList() 
+StaticCSSRuleList::StaticCSSRuleList()
     : m_refCount(1)
-{ 
+{
 }
 
 StaticCSSRuleList::~StaticCSSRuleList()
@@ -44,7 +44,7 @@ StaticCSSRuleList::~StaticCSSRuleList()
 }
 
 void StaticCSSRuleList::deref()
-{ 
+{
     ASSERT(m_refCount);
     if (!--m_refCount)
         delete this;