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

chrome/browser/ui/browser_init.cc

Index: chrome/browser/ui/browser_init.cc
===================================================================
--- chrome/browser/ui/browser_init.cc	(revision 105162)
+++ chrome/browser/ui/browser_init.cc	(working copy)
@@ -1086,7 +1086,7 @@
     int index = browser->GetIndexForInsertionDuringRestore(i);
 
     browser::NavigateParams params(browser, tabs[i].url,
-                                   PageTransition::START_PAGE);
+                                   content::PAGE_TRANSITION_START_PAGE);
     params.disposition = first_tab ? NEW_FOREGROUND_TAB : NEW_BACKGROUND_TAB;
     params.tabstrip_index = index;
     params.tabstrip_add_types = add_types;
@@ -1201,7 +1201,7 @@
 
 bool LearnMoreInfoBar::LinkClicked(WindowOpenDisposition disposition) {
   owner()->tab_contents()->OpenURL(learn_more_url_, GURL(), disposition,
-                                   PageTransition::LINK);
+                                   content::PAGE_TRANSITION_LINK);
   return false;
 }