Removing a bunch of unused platform code.

Source/WTF/wtf/text/WTFString.h

Index: Source/WTF/wtf/text/WTFString.h
diff --git a/Source/WTF/wtf/text/WTFString.h b/Source/WTF/wtf/text/WTFString.h
index 9c0fc27fe3807b8a4d0658ab7f13719c26abab8c..fc72a31a881b725e9ab1bb6d8cbea49db92696d9 100644
--- a/Source/WTF/wtf/text/WTFString.h
+++ b/Source/WTF/wtf/text/WTFString.h
@@ -32,24 +32,6 @@
 #include <objc/objc.h>
 #endif
 
-#if PLATFORM(QT)
-QT_BEGIN_NAMESPACE
-class QString;
-QT_END_NAMESPACE
-#endif
-
-#if PLATFORM(WX)
-class wxString;
-#endif
-
-#if PLATFORM(BLACKBERRY)
-namespace BlackBerry {
-namespace Platform {
-class String;
-}
-}
-#endif
-
 namespace WTF {
 
 class CString;
@@ -360,11 +342,7 @@ public:
     // Return the string with case folded for case insensitive comparison.
     WTF_EXPORT_STRING_API String foldCase() const;
 
-#if !PLATFORM(QT)
     WTF_EXPORT_STRING_API static String format(const char *, ...) WTF_ATTRIBUTE_PRINTF(1, 2);
-#else
-    WTF_EXPORT_STRING_API static String format(const char *, ...);
-#endif
 
     // Returns an uninitialized string. The characters needs to be written
     // into the buffer returned in data before the returned string is used.
@@ -426,22 +404,6 @@ public:
     operator NSString*() const { if (!m_impl) return @""; return *m_impl; }
 #endif
 
-#if PLATFORM(QT)
-    WTF_EXPORT_STRING_API String(const QString&);
-    WTF_EXPORT_STRING_API String(const QStringRef&);
-    WTF_EXPORT_STRING_API operator QString() const;
-#endif
-
-#if PLATFORM(WX)
-    WTF_EXPORT_PRIVATE String(const wxString&);
-    WTF_EXPORT_PRIVATE operator wxString() const;
-#endif
-
-#if PLATFORM(BLACKBERRY)
-    String(const BlackBerry::Platform::String&);
-    operator BlackBerry::Platform::String() const;
-#endif
-
     WTF_EXPORT_STRING_API static String make8BitFrom16BitSource(const UChar*, size_t);
     template<size_t inlineCapacity>
     static String make8BitFrom16BitSource(const Vector<UChar, inlineCapacity>& buffer)