Start moving core pieces of Chrome multi-process code to src\content.

chrome/browser/tab_contents/language_state.cc

-// Copyright (c) 2010 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 "chrome/browser/tab_contents/language_state.h"
-
-#include "chrome/browser/tab_contents/navigation_controller.h"
-#include "chrome/browser/tab_contents/navigation_entry.h"
-
-LanguageState::LanguageState(NavigationController* nav_controller)
-    : navigation_controller_(nav_controller),
-      page_translatable_(false),
-      translation_pending_(false),
-      translation_declined_(false),
-      in_page_navigation_(false) {
-}
-
-LanguageState::~LanguageState() {
-}
-
-void LanguageState::DidNavigate(
-    const NavigationController::LoadCommittedDetails& details) {
-  in_page_navigation_ = details.is_in_page;
-  if (in_page_navigation_ || !details.is_main_frame)
-    return;  // Don't reset our states, the page has not changed.
-
-  bool reload = details.entry->transition_type() == PageTransition::RELOAD ||
-                details.type == NavigationType::SAME_PAGE;
-  if (reload) {
-    // We might not get a LanguageDetermined notifications on reloads. Make sure
-    // to keep the original language and to set current_lang_ so
-    // IsPageTranslated() returns false.
-    current_lang_ = original_lang_;
-  } else {
-    prev_original_lang_ = original_lang_;
-    prev_current_lang_ = current_lang_;
-    original_lang_.clear();
-    current_lang_.clear();
-  }
-
-  translation_pending_ = false;
-  translation_declined_ = false;
-}
-
-void LanguageState::LanguageDetermined(const std::string& page_language,
-                                       bool page_translatable) {
-  if (in_page_navigation_ && !original_lang_.empty()) {
-    // In-page navigation, we don't expect our states to change.
-    // Note that we'll set the languages if original_lang_ is empty.  This might
-    // happen if the we did not get called on the top-page.
-    return;
-  }
-  page_translatable_ = page_translatable;
-  original_lang_ = page_language;
-  current_lang_ = page_language;
-}
-
-std::string LanguageState::AutoTranslateTo() const {
-  // Only auto-translate if:
-  // - no translation is pending
-  // - this page is in the same language as the previous page
-  // - the previous page had been translated
-  // - this page is not already translated
-  // - the new page was navigated through a link.
-  if (!translation_pending_ &&
-      prev_original_lang_ == original_lang_ &&
-      prev_original_lang_ != prev_current_lang_ &&
-      original_lang_ == current_lang_ &&
-      navigation_controller_->GetActiveEntry() &&
-      navigation_controller_->GetActiveEntry()->transition_type() ==
-          PageTransition::LINK) {
-    return prev_current_lang_;
-  }
-
-  return std::string();
-}