IWYU fixes for url/...

url/url_util.h

 // Copyright 2013 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 URL_URL_UTIL_H_
 #define URL_URL_UTIL_H_
 
 #include <string>
 
 #include "base/strings/string16.h"
 #include "url/third_party/mozilla/url_parse.h"
 #include "url/url_canon.h"
 #include "url/url_constants.h"
 #include "url/url_export.h"
 
 namespace url {
 
 // Init ------------------------------------------------------------------------
 
 // Initialization is NOT required, it will be implicitly initialized when first
 // used. However, this implicit initialization is NOT threadsafe. If you are
 // using this library in a threaded environment and don't have a consistent
 // "first call" (an example might be calling AddStandardScheme with your special
 // application-specific schemes) then you will want to call initialize before
 // spawning any threads.
 //
 // It is OK to call this function more than once, subsequent calls will be
 // no-ops, unless Shutdown was called in the mean time. This will also be a
 // no-op if other calls to the library have forced an initialization beforehand.
+struct Component;
+struct Parsed;
+
 URL_EXPORT void Initialize();
 
 // Cleanup is not required, except some strings may leak. For most user
 // applications, this is fine. If you're using it in a library that may get
 // loaded and unloaded, you'll want to unload to properly clean up your
 // library.
 URL_EXPORT void Shutdown();
 
 // Schemes --------------------------------------------------------------------
 
@@ skipping 160 matching lines @@
 
 // Escapes the given string as defined by the JS method encodeURIComponent. See
 // https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/encodeURIComponent
 URL_EXPORT void EncodeURIComponent(const char* input,
                                    int length,
                                    CanonOutput* output);
 
 }  // namespace url
 
 #endif  // URL_URL_UTIL_H_