Move PageTransition into content namespace. While I'm touching all these files, I've also updated...

chrome/browser/tab_contents/language_state.cc

 // Copyright (c) 2011 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 "content/browser/tab_contents/navigation_details.h"
 #include "content/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 content::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;
+  bool reload =
+      details.entry->transition_type() == content::PAGE_TRANSITION_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();
@@ skipping 22 matching lines @@
   // - 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) {
+          content::PAGE_TRANSITION_LINK) {
     return prev_current_lang_;
   }
 
   return std::string();
 }