Introduce components/favicon/ios

In preparation of the creation of WebFaviconDriver, introduce helper functions
to convert from web::FaviconURL to favicon::FaviconURL mirroring the functions
to convert from content::FaviconURL to favicon::FaviconURL.

BUG=472117

Review URL: https://codereview.chromium.org/1050403002

Cr-Commit-Position: refs/heads/master@{#323488}

3 files changed, 82 insertions, 0 deletions

diff --git a/components/favicon/ios/DEPS b/components/favicon/ios/DEPS
new file mode 100644
index 0000000..0fc0ddd
--- /dev/null
+++ b/components/favicon/ios/DEPS
@@ -0,0 +1,3 @@
+include_rules = [
+  "+ios/web/public",
+]
diff --git a/components/favicon/ios/favicon_url_util.cc b/components/favicon/ios/favicon_url_util.cc
new file mode 100644
index 0000000..95bcfda
--- /dev/null
+++ b/components/favicon/ios/favicon_url_util.cc
@@ -0,0 +1,51 @@
+// Copyright 2015 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/favicon/ios/favicon_url_util.h"
+
+#include <algorithm>
+#include <iterator>
+
+#include "components/favicon/core/favicon_url.h"
+#include "components/favicon_base/favicon_types.h"
+#include "ios/web/public/favicon_url.h"
+
+namespace favicon {
+namespace {
+
+favicon_base::IconType IconTypeFromWebIconType(
+    web::FaviconURL::IconType icon_type) {
+  switch (icon_type) {
+    case web::FaviconURL::FAVICON:
+      return favicon_base::FAVICON;
+    case web::FaviconURL::TOUCH_ICON:
+      return favicon_base::TOUCH_ICON;
+    case web::FaviconURL::TOUCH_PRECOMPOSED_ICON:
+      return favicon_base::TOUCH_PRECOMPOSED_ICON;
+    case web::FaviconURL::INVALID_ICON:
+      return favicon_base::INVALID_ICON;
+  }
+  NOTREACHED();
+  return favicon_base::INVALID_ICON;
+}
+
+}  // namespace
+
+FaviconURL FaviconURLFromWebFaviconURL(
+    const web::FaviconURL& favicon_url) {
+  return FaviconURL(favicon_url.icon_url,
+                    IconTypeFromWebIconType(favicon_url.icon_type),
+                    favicon_url.icon_sizes);
+}
+
+std::vector<FaviconURL> FaviconURLsFromWebFaviconURLs(
+    const std::vector<web::FaviconURL>& favicon_urls) {
+  std::vector<FaviconURL> result;
+  result.reserve(favicon_urls.size());
+  std::transform(favicon_urls.begin(), favicon_urls.end(),
+                 std::back_inserter(result), FaviconURLFromWebFaviconURL);
+  return result;
+}
+
+}  // namespace favicon
diff --git a/components/favicon/ios/favicon_url_util.h b/components/favicon/ios/favicon_url_util.h
new file mode 100644
index 0000000..a76db07
--- /dev/null
+++ b/components/favicon/ios/favicon_url_util.h
@@ -0,0 +1,28 @@
+// Copyright 2015 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_FAVICON_IOS_FAVICON_URL_UTIL_H_
+#define COMPONENTS_FAVICON_IOS_FAVICON_URL_UTIL_H_
+
+#include <vector>
+
+namespace web {
+struct FaviconURL;
+}
+
+namespace favicon {
+
+struct FaviconURL;
+
+// Creates a favicon::FaviconURL from a web::FaviconURL.
+FaviconURL FaviconURLFromWebFaviconURL(
+    const web::FaviconURL& favicon_url);
+
+// Creates favicon::FaviconURLs from web::FaviconURLs.
+std::vector<FaviconURL> FaviconURLsFromWebFaviconURLs(
+    const std::vector<web::FaviconURL>& favicon_urls);
+
+}  // namespace favicon
+
+#endif  // COMPONENTS_FAVICON_IOS_FAVICON_URL_UTIL_H_