Fix trailing whitespace in .cpp, .h, and .idl files (ex. Source/core)

Source/wtf/Platform.h

Index: Source/wtf/Platform.h
diff --git a/Source/wtf/Platform.h b/Source/wtf/Platform.h
index 1d118f2b7fc979f25cc3d13241f617be3c78f19e..1fe86d3de0abf715e3f5f3eab7299c272e16e0f6 100644
--- a/Source/wtf/Platform.h
+++ b/Source/wtf/Platform.h
@@ -35,7 +35,7 @@
 
 /* HAVE() - specific system features (headers, functions or similar) that are present or not */
 #define HAVE(WTF_FEATURE) (defined HAVE_##WTF_FEATURE  && HAVE_##WTF_FEATURE)
-/* OS() - underlying operating system; only to be used for mandated low-level services like 
+/* OS() - underlying operating system; only to be used for mandated low-level services like
    virtual memory, not to choose a GUI toolkit */
 #define OS(WTF_FEATURE) (defined WTF_OS_##WTF_FEATURE  && WTF_OS_##WTF_FEATURE)
 
@@ -46,7 +46,7 @@
 /* ENABLE() - turn on a specific feature of WebKit */
 #define ENABLE(WTF_FEATURE) (defined ENABLE_##WTF_FEATURE  && ENABLE_##WTF_FEATURE)
 
-/* ==== OS() - underlying operating system; only to be used for mandated low-level services like 
+/* ==== OS() - underlying operating system; only to be used for mandated low-level services like
    virtual memory, not to choose a GUI toolkit ==== */
 
 /* OS(ANDROID) - Android */
@@ -137,10 +137,10 @@
 
 #if OS(UNIX)
 #define HAVE_ERRNO_H 1
-#define HAVE_MMAP 1   
+#define HAVE_MMAP 1
 #define HAVE_SIGNAL_H 1
 #define HAVE_STRINGS_H 1
-#define HAVE_SYS_TIME_H 1 
+#define HAVE_SYS_TIME_H 1
 #define WTF_USE_PTHREADS 1
 #endif /* OS(UNIX) */