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

Source/core/page/PrintContext.cpp

Index: Source/core/page/PrintContext.cpp
diff --git a/Source/core/page/PrintContext.cpp b/Source/core/page/PrintContext.cpp
index b1e2bf706b17aa6df2b054a57e9242da1de4b97e..a8c284079f400d914a25f1dc2edc710dc8c8cbcd 100644
--- a/Source/core/page/PrintContext.cpp
+++ b/Source/core/page/PrintContext.cpp
@@ -138,7 +138,7 @@ void PrintContext::computePageRectsWithPageSizeInternal(const FloatSize& pageSiz
     unsigned pageCount = ceilf((float)docLogicalHeight / pageLogicalHeight);
     for (unsigned i = 0; i < pageCount; ++i) {
         int pageLogicalTop = blockDirectionEnd > blockDirectionStart ?
-                                blockDirectionStart + i * pageLogicalHeight : 
+                                blockDirectionStart + i * pageLogicalHeight :
                                 blockDirectionStart - (i + 1) * pageLogicalHeight;
         if (allowInlineDirectionTiling) {
             for (int currentInlinePosition = inlineDirectionStart;