Move fetch-related predicates to core/fetch.

Source/core/fetch/FetchUtils.h

Index: Source/core/fetch/FetchUtils.h
diff --git a/Source/core/fetch/FetchUtils.h b/Source/core/fetch/FetchUtils.h
new file mode 100644
index 0000000000000000000000000000000000000000..1b6a177a22c1a6784c22d0d248cfe344ba65dddc
--- /dev/null
+++ b/Source/core/fetch/FetchUtils.h
@@ -0,0 +1,31 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef FetchUtils_h
+#define FetchUtils_h
+
+#include "wtf/Forward.h"
+
+namespace blink {
+
+class HTTPHeaderMap;
+
+class FetchUtils {
+public:
+    static bool isSimpleMethod(const String& method);
+    static bool isSimpleHeader(const AtomicString& name, const AtomicString& value);
+    static bool isSimpleRequest(const String& method, const HTTPHeaderMap&);
+    static bool isForbiddenMethod(const String& method);
+    static bool isUsefulMethod(const String& method) { return !isForbiddenMethod(method); }
+    static bool isForbiddenHeaderName(const String& name);
+    static bool isForbiddenResponseHeaderName(const String& name);
+    static bool isSimpleOrForbiddenRequest(const String& method, const HTTPHeaderMap&);
+
+private:
+    FetchUtils(); // = delete;
+};
+
+} // namespace blink
+
+#endif