[Translate] Migrate IPCs to Mojo interfaces.

components/translate/content/public/interfaces/translate.mojom

+// Copyright 2016 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.
+
+module translate.mojom;
+
+import "mojo/common/common_custom_types.mojom";
+import "url/mojo/url.mojom";
+
+// enum translate::TranslateErrors::Type
+enum TranslateErrorsType {
+  NONE,
+  NETWORK,
+  INITIALIZATION_ERROR,
+  UNKNOWN_LANGUAGE,
+  UNSUPPORTED_LANGUAGE,
+  IDENTICAL_LANGUAGES,
+  TRANSLATION_ERROR,
+  TRANSLATION_TIMEOUT,
+  UNEXPECTED_SCRIPT_ERROR,
+  BAD_ORIGIN,
+  SCRIPT_LOAD_ERROR,
+  TRANSLATE_ERROR_MAX,
+};
+
+// struct translate::LanguageDetectionDetails
+struct LanguageDetectionDetails {
+  mojo.common.mojom.Time time;
+  url.mojom.Url url;
+  string content_language;
+  string cld_language;
+  bool is_cld_reliable;
+  bool has_notranslate;
+  string html_root_language;
+  string adopted_language;
+  string contents;
+};
+
+interface Page {
+  // Tells the renderer to translate the page contents from one language to
+  // another.
+  // When overlapping calls happened, for example,
+  // #2 call comes up while #1 call is still running:
+  // IF #2 target_lang is the same with #1,
+  //   #2 will do nothing but just returns |cancelled| parameter as true;
+  // ELSE
+  //   #1 will be cancelled and returns |cancelled| parameter as true.
+  // In case of true |cancelled|, callers should ignore other parameters.
+  Translate(string translate_script, string source_lang, string target_lang)
+      => (bool cancelled,
+          string original_lang,
+          string translated_lang,
+          TranslateErrorsType error_type);
+
+  // Tells the renderer to revert the text of translated page to its original
+  // contents.
+  RevertTranslation();
+};
+
+interface ContentTranslateDriver {
+  // Notification that a new page is ready to translate,
+  // and the language for it has been determined.
+  NewPage(Page page,
+          LanguageDetectionDetails details,
+          bool page_needs_translation);
+};