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

chrome/browser/printing/print_preview_tab_controller_unittest.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/printing/print_preview_tab_controller.h"
 #include "chrome/browser/tabs/tab_strip_model.h"
 #include "chrome/browser/ui/browser_list.h"
 #include "chrome/browser/ui/tab_contents/tab_contents_wrapper.h"
 #include "chrome/browser/ui/webui/print_preview_ui.h"
 #include "chrome/test/base/browser_with_test_window_test.h"
@@ skipping 76 matching lines @@
 
   // Set up a PrintPreviewUI for |preview_tab|.
   PrintPreviewUI* preview_ui = new PrintPreviewUI(preview_tab->tab_contents());
   // RenderViewHostManager takes ownership of |preview_ui|.
   preview_tab->tab_contents()->render_manager_for_testing()->
       SetWebUIPostCommit(preview_ui);
 
   // Simulate a reload event on |preview_tab|.
   scoped_ptr<NavigationEntry> entry;
   entry.reset(new NavigationEntry());
-  entry->set_transition_type(PageTransition::RELOAD);
+  entry->set_transition_type(content::PAGE_TRANSITION_RELOAD);
   content::LoadCommittedDetails details;
   details.type = NavigationType::SAME_PAGE;
   details.entry = entry.get();
   NotificationService::current()->Notify(
       content::NOTIFICATION_NAV_ENTRY_COMMITTED,
       Source<NavigationController>(&preview_tab->controller()),
       Details<content::LoadCommittedDetails>(&details));
   EXPECT_EQ(initiator_tab->tab_contents()->GetTitle(),
             preview_ui->initiator_tab_title_);
 }
@@ skipping 89 matching lines @@
   tab_controller->EraseInitiatorTabInfo(preview_tab);
 
   // Get the print preview tab for initiator tab.
   TabContentsWrapper* new_preview_tab =
       tab_controller->GetOrCreatePreviewTab(initiator_tab);
 
   // New preview tab is created.
   EXPECT_EQ(3, browser()->tab_count());
   EXPECT_NE(new_preview_tab, preview_tab);
 }