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

Source/core/html/HTMLTextFormControlElement.cpp

Index: Source/core/html/HTMLTextFormControlElement.cpp
diff --git a/Source/core/html/HTMLTextFormControlElement.cpp b/Source/core/html/HTMLTextFormControlElement.cpp
index d7d3c327555fc1113fe7b4da28894d2620de88b7..cfc10a524594d491666ec8967362145c8090a452 100644
--- a/Source/core/html/HTMLTextFormControlElement.cpp
+++ b/Source/core/html/HTMLTextFormControlElement.cpp
@@ -623,7 +623,7 @@ HTMLTextFormControlElement* enclosingTextFormControl(const Position& position)
     ASSERT(position.isNull() || position.anchorType() == Position::PositionIsOffsetInAnchor
         || position.containerNode() || !position.anchorNode()->shadowHost()
         || (position.anchorNode()->parentNode() && position.anchorNode()->parentNode()->isShadowRoot()));
-        
+
     Node* container = position.containerNode();
     if (!container)
         return 0;