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

Source/core/html/shadow/ProgressShadowElement.h

Index: Source/core/html/shadow/ProgressShadowElement.h
diff --git a/Source/core/html/shadow/ProgressShadowElement.h b/Source/core/html/shadow/ProgressShadowElement.h
index 7cdf2f1353c5c8a86b0c0a0b095dba655ab9ee8b..b46a55a14319a829a7d4126ceeffc071518cded7 100644
--- a/Source/core/html/shadow/ProgressShadowElement.h
+++ b/Source/core/html/shadow/ProgressShadowElement.h
@@ -60,7 +60,7 @@ private:
 
 class ProgressBarElement FINAL : public ProgressShadowElement {
 public:
-    ProgressBarElement(Document* document) 
+    ProgressBarElement(Document* document)
         : ProgressShadowElement(document)
     {
         DEFINE_STATIC_LOCAL(AtomicString, pseudoId, ("-webkit-progress-bar", AtomicString::ConstructFromLiteral));
@@ -77,7 +77,7 @@ inline PassRefPtr<ProgressBarElement> ProgressBarElement::create(Document* docum
 
 class ProgressValueElement FINAL : public ProgressShadowElement {
 public:
-    ProgressValueElement(Document* document) 
+    ProgressValueElement(Document* document)
         : ProgressShadowElement(document)
     {
         DEFINE_STATIC_LOCAL(AtomicString, pseudoId, ("-webkit-progress-value", AtomicString::ConstructFromLiteral));