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

content/browser/tab_contents/provisional_load_details.h

Index: content/browser/tab_contents/provisional_load_details.h
===================================================================
--- content/browser/tab_contents/provisional_load_details.h	(revision 105162)
+++ content/browser/tab_contents/provisional_load_details.h	(working copy)
@@ -9,7 +9,7 @@
 #include <string>
 
 #include "base/basictypes.h"
-#include "content/common/page_transition_types.h"
+#include "content/public/common/page_transition_types.h"
 #include "googleurl/src/gurl.h"
 #include "net/base/cert_status_flags.h"
 
@@ -34,10 +34,10 @@
   void set_error_code(int error_code) { error_code_ = error_code; }
   int error_code() const { return error_code_; }
 
-  void set_transition_type(PageTransition::Type transition_type) {
+  void set_transition_type(content::PageTransition transition_type) {
     transition_type_ = transition_type;
   }
-  PageTransition::Type transition_type() const {
+  content::PageTransition transition_type() const {
     return transition_type_;
   }
 
@@ -61,7 +61,7 @@
 
  private:
   int error_code_;
-  PageTransition::Type transition_type_;
+  content::PageTransition transition_type_;
   GURL url_;
   bool is_main_frame_;
   bool is_in_page_navigation_;