Fix trailing whitespace in .cpp, .h, and .idl files (ex. Source/core)

Source/web/AssociatedURLLoader.cpp

Index: Source/web/AssociatedURLLoader.cpp
diff --git a/Source/web/AssociatedURLLoader.cpp b/Source/web/AssociatedURLLoader.cpp
index 56a1f2fcfd37eeac7cb742ecd1e9c64160808977..ccf03cb173771fbeaefe98591a82571cf6db9543 100644
--- a/Source/web/AssociatedURLLoader.cpp
+++ b/Source/web/AssociatedURLLoader.cpp
@@ -151,7 +151,7 @@ public:
     void enableErrorNotifications();
 
     // Stops loading and releases the DocumentThreadableLoader as early as possible.
-    void clearClient() { m_client = 0; } 
+    void clearClient() { m_client = 0; }
 
 private:
     ClientAdapter(AssociatedURLLoader*, WebURLLoaderClient*, const WebURLLoaderOptions&);