Move LanguageState to the translate component

components/translate/content/browser/content_translate_client.cc

+// Copyright 2014 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/translate/content/browser/content_translate_client.h"
+
+#include "components/translate/content/browser/language_state_observer.h"
+#include "content/public/browser/navigation_controller.h"
+#include "content/public/browser/navigation_details.h"
+#include "content/public/browser/navigation_entry.h"
+
+ContentTranslateClient::ContentTranslateClient(
+    content::NavigationController* nav_controller)
+    : navigation_controller_(nav_controller),
+      language_state_observer_(NULL) {
+}
+
+ContentTranslateClient::~ContentTranslateClient() {}
+
+void ContentTranslateClient::SetLanguageStateObserver(
+    LanguageStateObserver* observer) {
+  language_state_observer_ = observer;
+}
+
+void ContentTranslateClient::DidNavigate(
+    const content::LoadCommittedDetails& details) {
+  const bool reload =
+      details.entry->GetTransitionType() == content::PAGE_TRANSITION_RELOAD ||
+      details.type == content::NAVIGATION_TYPE_SAME_PAGE;
+  language_state_.DidNavigate(
+      details.is_in_page, details.is_main_frame, reload);
+}
+
+// TranslateClient methods
+
+bool ContentTranslateClient::IsLinkNavigation() {
+  return navigation_controller_ &&
+      navigation_controller_->GetActiveEntry() &&
+      navigation_controller_->GetActiveEntry()->GetTransitionType() ==
+          content::PAGE_TRANSITION_LINK;
+}
+
+void ContentTranslateClient::OnTranslateEnabledChanged() {
+  if (language_state_observer_) {
+    content::WebContents* web_contents =
+        navigation_controller_->GetWebContents();
+    language_state_observer_->OnTranslateEnabledChanged(web_contents);
+  }
+}
+
+void ContentTranslateClient::OnIsPageTranslatedChanged() {
+  if (language_state_observer_) {
+    content::WebContents* web_contents =
+        navigation_controller_->GetWebContents();
+    language_state_observer_->OnIsPageTranslatedChanged(web_contents);
+  }
+}