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

chrome/browser/ui/webui/print_preview_handler.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/ui/webui/print_preview_handler.h"
 
 #include <ctype.h>
 
 #include <string>
 #include <vector>
@@ skipping 852 matching lines @@
   // http://code.google.com/p/chromium/issues/detail?id=44093
   ActivateInitiatorTabAndClosePreviewTab();
 }
 
 void PrintPreviewHandler::HandleManageCloudPrint(const ListValue* /*args*/) {
   Browser* browser = BrowserList::GetLastActive();
   browser->OpenURL(CloudPrintURL(browser->profile()).
                    GetCloudPrintServiceManageURL(),
                    GURL(),
                    NEW_FOREGROUND_TAB,
-                   PageTransition::LINK);
+                   content::PAGE_TRANSITION_LINK);
 }
 
 void PrintPreviewHandler::HandleShowSystemDialog(const ListValue* /*args*/) {
   ReportStats();
   ReportUserActionHistogram(FALLBACK_TO_ADVANCED_SETTINGS_DIALOG);
 
   TabContentsWrapper* initiator_tab = GetInitiatorTab();
   if (!initiator_tab)
     return;
 
@@ skipping 15 matching lines @@
     const ListValue* /*args*/) {
   ReportStats();
   ReportUserActionHistogram(INITIATOR_TAB_CRASHED);
 
   TabContentsWrapper* initiator_tab = GetInitiatorTab();
   if (!initiator_tab)
     return;
 
   TabContents* contents = initiator_tab->tab_contents();
   contents->OpenURL(contents->GetURL(), GURL(), CURRENT_TAB,
-                    PageTransition::RELOAD);
+                    content::PAGE_TRANSITION_RELOAD);
   ActivateInitiatorTabAndClosePreviewTab();
 }
 
 void PrintPreviewHandler::HandleClosePreviewTab(const ListValue* /*args*/) {
   ReportStats();
   ReportUserActionHistogram(CANCEL);
 
   // Record the number of times the user requests to regenerate preview data
   // before cancelling.
   UMA_HISTOGRAM_COUNTS("PrintPreview.RegeneratePreviewRequest.BeforeCancel",
@@ skipping 242 matching lines @@
     return;
 
   // We no longer require the initiator tab details. Remove those details
   // associated with the preview tab to allow the initiator tab to create
   // another preview tab.
   printing::PrintPreviewTabController* tab_controller =
       printing::PrintPreviewTabController::GetInstance();
   if (tab_controller)
     tab_controller->EraseInitiatorTabInfo(preview_tab_wrapper());
 }