Implement i18n::addressinput::Downloader for requestAutocomplete() (and

components/autofill/core/browser/validation_downloader.h

Index: components/autofill/core/browser/validation_downloader.h
diff --git a/components/autofill/core/browser/validation_downloader.h b/components/autofill/core/browser/validation_downloader.h
new file mode 100644
index 0000000000000000000000000000000000000000..77fc8923967da48a547ca6216f81757f3dd5a6d7
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+++ b/components/autofill/core/browser/validation_downloader.h
@@ -0,0 +1,49 @@
+// 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 COMPONENTS_AUTOFILL_CORE_BROWSER_VALIDATION_DOWNLOADER_H_
+#define COMPONENTS_AUTOFILL_CORE_BROWSER_VALIDATION_DOWNLOADER_H_
+
+#include <map>
+
+#include "base/memory/scoped_vector.h"
+#include "third_party/libaddressinput/src/cpp/include/libaddressinput/downloader.h"
+
+namespace net {
+class URLFetcher;
+class URLRequestContextGetter;
+}
+
+namespace autofill {
+
+// A class for downloading rules to let libaddressinput validate international
+// addresses.
+class ValidationDownloader : public i18n::addressinput::Downloader {
+ public:
+  explicit ValidationDownloader(net::URLRequestContextGetter* getter);
+  virtual ~ValidationDownloader();
+
+  // i18n::addressinput::Downloader:
+  virtual void Download(
+      const std::string& url,
+      const i18n::addressinput::Downloader::Callback& downloaded) OVERRIDE;
+
+ private:
+  // Needed to create a net::URLFetcher. Weak, not owned.
+  net::URLRequestContextGetter* const getter_;
+
+  // All created fetchers; owned by this class and deleted upon destruction.
+  ScopedVector<net::URLFetcher> fetchers_;
+
+  // A map to trigger a callback when a fetcher completes.
+  typedef std::map<net::URLFetcher*, i18n::addressinput::Downloader::Callback>
+      CallbackMap;
+  CallbackMap callbacks_;
+
+  DISALLOW_COPY_AND_ASSIGN(ValidationDownloader);
+};
+
+}  // namespace autofill
+
+#endif  // COMPONENTS_AUTOFILL_CORE_BROWSER_VALIDATION_DOWNLOADER_H_