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

Source/core/html/HTMLMapElement.cpp

Index: Source/core/html/HTMLMapElement.cpp
diff --git a/Source/core/html/HTMLMapElement.cpp b/Source/core/html/HTMLMapElement.cpp
index 7c6ea39fd315d41757af242cf060e104121126e4..2d5d65fe0bd63aca3eea85f104ff14494a1baf61 100644
--- a/Source/core/html/HTMLMapElement.cpp
+++ b/Source/core/html/HTMLMapElement.cpp
@@ -85,7 +85,7 @@ HTMLImageElement* HTMLMapElement::imageElement()
     for (unsigned i = 0; Node* curr = images->item(i); i++) {
         if (!curr->hasTagName(imgTag))
             continue;
-        
+
         // The HTMLImageElement's useMap() value includes the '#' symbol at the beginning,
         // which has to be stripped off.
         HTMLImageElement* imageElement = toHTMLImageElement(curr);
@@ -93,8 +93,8 @@ HTMLImageElement* HTMLMapElement::imageElement()
         if (equalIgnoringCase(useMapName, m_name))
             return imageElement;
     }
-    
-    return 0;    
+
+    return 0;
 }
 
 void HTMLMapElement::parseAttribute(const QualifiedName& name, const AtomicString& value)