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

Source/core/accessibility/AccessibilityMockObject.cpp

Index: Source/core/accessibility/AccessibilityMockObject.cpp
diff --git a/Source/core/accessibility/AccessibilityMockObject.cpp b/Source/core/accessibility/AccessibilityMockObject.cpp
index b4b42d0163a17da94f5892043dfe3a6944fc0697..f826e52fc8e2cc682b5af55fd8fce26401b71eac 100644
--- a/Source/core/accessibility/AccessibilityMockObject.cpp
+++ b/Source/core/accessibility/AccessibilityMockObject.cpp
@@ -27,7 +27,7 @@
 #include "core/accessibility/AccessibilityMockObject.h"
 
 namespace WebCore {
-    
+
 AccessibilityMockObject::AccessibilityMockObject()
     : m_parent(0)
 {
@@ -36,10 +36,10 @@ AccessibilityMockObject::AccessibilityMockObject()
 AccessibilityMockObject::~AccessibilityMockObject()
 {
 }
-    
+
 bool AccessibilityMockObject::computeAccessibilityIsIgnored() const
 {
     return accessibilityIsIgnoredByDefault();
 }
-    
+
 }