Adds the AddressNormalizationManager and tests.

components/payments/core/address_normalization_manager.cc

+// Copyright 2017 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.
+
+#include "components/payments/core/address_normalization_manager.h"
+
+#include "base/memory/ptr_util.h"
+#include "base/strings/utf_string_conversions.h"
+#include "components/autofill/core/browser/autofill_data_util.h"
+#include "components/autofill/core/browser/field_types.h"
+#include "components/payments/core/address_normalizer.h"
+
+namespace payments {
+
+namespace {
+constexpr int kAddressNormalizationTimeoutSeconds = 5;
+}  // namespace
+
+// Implements the payments::AddressNormalizer::Delegate interface, and
+// notifies its parent AddressNormalizationManager when normalization has
+// completed.
+class AddressNormalizationManager::NormalizerDelegate
+    : public payments::AddressNormalizer::Delegate {

[Mathieu, 2017/05/17 16:45:14]

no need for payments::

[macourteau, 2017/05/17 18:38:40]

Done.

+ public:
+  // |owner| is the parent AddressNormalizationManager, |address_normalizer| is
+  // a pointer to an instance of AddressNormalizer which will handle
+  // normalization of |profile|. |profile| will be updated when normalization is
+  // complete.
+  NormalizerDelegate(AddressNormalizationManager* owner,
+                     AddressNormalizer* address_normalizer,
+                     autofill::AutofillProfile* profile);
+
+  // Returns whether this delegate has completed or not.
+  bool HasCompleted() const;
+
+  // payments::AddressNormalizer::Delegate:
+  void OnAddressNormalized(
+      const autofill::AutofillProfile& normalized_profile) override;
+  void OnCouldNotNormalize(const autofill::AutofillProfile& profile) override;
+
+ private:
+  // Helper method that handles when normalization has completed.
+  void OnCompletion(const autofill::AutofillProfile& profile);
+
+  bool has_completed_ = false;
+  AddressNormalizationManager* owner_ = nullptr;
+  autofill::AutofillProfile* profile_ = nullptr;
+
+  DISALLOW_COPY_AND_ASSIGN(NormalizerDelegate);
+};
+
+AddressNormalizationManager::AddressNormalizationManager(
+    std::unique_ptr<AddressNormalizer> address_normalizer,
+    const std::string& default_country_code)
+    : default_country_code_(default_country_code),
+      address_normalizer_(std::move(address_normalizer)) {
+  DCHECK(autofill::data_util::IsValidCountryCode(default_country_code));
+  DCHECK(address_normalizer_);
+
+  // Start loading rules for the default country code. This happens
+  // asynchronously, and will speed up normalization later if the rules for the
+  // address' region have already been loaded.
+  address_normalizer_->LoadRulesForRegion(default_country_code);
+}
+
+AddressNormalizationManager::~AddressNormalizationManager() {}
+
+void AddressNormalizationManager::FinalizeWithCompletionCallback(
+    CompletionCallback completion_callback) {
+  DCHECK_CALLED_ON_VALID_THREAD(thread_checker_);
+  completion_callback_ = std::move(completion_callback);
+  accepting_requests_ = false;
+  MaybeRunCompletionCallback();
+}
+
+void AddressNormalizationManager::StartNormalizingAddress(
+    autofill::AutofillProfile* profile) {
+  DCHECK_CALLED_ON_VALID_THREAD(thread_checker_);
+  DCHECK(accepting_requests_) << "FinalizeWithCompletionCallback has been "
+                                 "called, cannot normalize more addresses";
+
+  delegates_.push_back(base::MakeUnique<NormalizerDelegate>(

[Mathieu, 2017/05/17 16:45:14]

can we use emplace_back and remove the std::unique_ptr for NormalizerDelegate?

[macourteau, 2017/05/17 18:38:40]

NormalizerDelegate is noncopyable (DISALLOW_COPY_AND_ASSIGN), which is by
design, since the AddressNormalizer requires a pointer to its delegate (i.e. it
can't change). Storing the objects directly in the vector (w/o a pointer)
doesn't work if the object is noncopyable. move construction/assignment wouldn't
work either since the delegate pointer passed to AddressNormalizer would no
longer be valid.

+      this, address_normalizer_.get(), profile));
+}
+
+void AddressNormalizationManager::MaybeRunCompletionCallback() {
+  if (accepting_requests_ || !completion_callback_)
+    return;
+
+  for (const auto& delegate : delegates_) {
+    if (!delegate->HasCompleted()) {
+      return;
+    }
+  }
+
+  // We're no longer accepting requests, and all the delegates have completed.
+  // Now's the time to run the completion callback.
+  std::move(completion_callback_).Run(*this);
+}
+
+AddressNormalizationManager::NormalizerDelegate::NormalizerDelegate(
+    AddressNormalizationManager* owner,
+    AddressNormalizer* address_normalizer,
+    autofill::AutofillProfile* profile)
+    : owner_(owner), profile_(profile) {
+  DCHECK(owner_);
+  DCHECK(profile_);
+
+  std::string country_code =
+      base::UTF16ToUTF8(profile_->GetRawInfo(autofill::ADDRESS_HOME_COUNTRY));
+  if (!autofill::data_util::IsValidCountryCode(country_code)) {

[Mathieu, 2017/05/17 16:45:14]

nit: no curlies

[macourteau, 2017/05/17 18:38:40]

Done.

+    country_code = owner_->default_country_code_;
+  }
+
+  address_normalizer->StartAddressNormalization(
+      *profile_, country_code, kAddressNormalizationTimeoutSeconds, this);
+}
+
+bool AddressNormalizationManager::NormalizerDelegate::HasCompleted() const {

[Mathieu, 2017/05/17 16:45:14]

has_completed() can be used

[macourteau, 2017/05/17 18:38:40]

Done.

+  return has_completed_;
+}
+
+void AddressNormalizationManager::NormalizerDelegate::OnAddressNormalized(
+    const autofill::AutofillProfile& normalized_profile) {
+  OnCompletion(normalized_profile);
+}
+
+void AddressNormalizationManager::NormalizerDelegate::OnCouldNotNormalize(
+    const autofill::AutofillProfile& profile) {
+  // Since the phone number is formatted in either case, this profile should
+  // be used.
+  OnCompletion(profile);
+}
+
+void AddressNormalizationManager::NormalizerDelegate::OnCompletion(
+    const autofill::AutofillProfile& profile) {
+  DCHECK(!has_completed_);
+  has_completed_ = true;
+  *profile_ = profile;
+  owner_->MaybeRunCompletionCallback();
+}
+
+}  // namespace payments