Move TextStream to Source/platform/text/

Source/platform/text/TextStream.h

Index: Source/platform/text/TextStream.h
diff --git a/Source/core/platform/text/TextStream.h b/Source/platform/text/TextStream.h
similarity index 96%
rename from Source/core/platform/text/TextStream.h
rename to Source/platform/text/TextStream.h
index fab4d9d611454da6fb0874df593e54c76a44e516..d7ecf1c2ed8d0dfcb7baac8cd599de475e4e54ae 100644
--- a/Source/core/platform/text/TextStream.h
+++ b/Source/platform/text/TextStream.h
@@ -26,13 +26,14 @@
 #ifndef TextStream_h
 #define TextStream_h
 
+#include "platform/PlatformExport.h"
 #include "wtf/Forward.h"
 #include "wtf/text/StringBuilder.h"
 #include "wtf/unicode/Unicode.h"
 
 namespace WebCore {
 
-class TextStream {
+class PLATFORM_EXPORT TextStream {
 public:
     struct FormatNumberRespectingIntegers {
         FormatNumberRespectingIntegers(double number) : value(number) { }