Remove OS(WINCE) as blink and chromium does not support WinCe.

Source/wtf/text/WTFString.cpp

Index: Source/wtf/text/WTFString.cpp
diff --git a/Source/wtf/text/WTFString.cpp b/Source/wtf/text/WTFString.cpp
index e79007c695279e4c5d1b89451d0546f6c2372e0f..83740ab05ac5046f7a9896a3c7be97ec2a5ef1d8 100644
--- a/Source/wtf/text/WTFString.cpp
+++ b/Source/wtf/text/WTFString.cpp
@@ -403,29 +403,6 @@ const UChar* String::charactersWithNullTermination()
 
 String String::format(const char *format, ...)
 {
-#if OS(WINCE)
-    va_list args;
-    va_start(args, format);
-
-    Vector<char, 256> buffer;
-
-    int bufferSize = 256;
-    buffer.resize(bufferSize);
-    for (;;) {
-        int written = vsnprintf(buffer.data(), bufferSize, format, args);
-        va_end(args);
-
-        if (written == 0)
-            return String("");
-        if (written > 0)
-            return StringImpl::create(reinterpret_cast<const LChar*>(buffer.data()), written);
-        
-        bufferSize <<= 1;
-        buffer.resize(bufferSize);
-        va_start(args, format);
-    }
-
-#else
     va_list args;
     va_start(args, format);
 
@@ -460,7 +437,6 @@ String String::format(const char *format, ...)
     va_end(args);
     
     return StringImpl::create(reinterpret_cast<const LChar*>(buffer.data()), len);
-#endif
 }
 
 String String::number(int number)