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

chrome/browser/sessions/session_utils_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/sessions/session_utils.h"
 
 #include "base/stl_util.h"
 #include "base/string16.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/sessions/session_types.h"
 #include "googleurl/src/gurl.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 class TabNavigationMock : public TabNavigation {
  public:
   TabNavigationMock(const char* url, const char* title)
       : TabNavigation(0,                                  // index
                       GURL(string16(ASCIIToUTF16(url))),  // virtual_url
                       GURL(),                             // referrer
                       string16(ASCIIToUTF16(title)),      // title
                       "",                                 // state
-                      PageTransition::FROM_ADDRESS_BAR) {
+                      content::PAGE_TRANSITION_FROM_ADDRESS_BAR) {
   }
 };
 
 class SessionUtilsTest : public testing::Test {
  protected:
   class TabMock : public TabRestoreService::Tab {
    public:
     TabMock(const char* url, const char* title) {
       navigations.push_back(TabNavigationMock(url, title));
       current_navigation_index = 0;
@@ skipping 34 matching lines @@
   ASSERT_EQ(7U, filtered_entries.size());
 
   // The filtering should have removed the second item
   TabRestoreService::Entries expected = entries_;
   TabRestoreService::Entry* first = expected.front();
   expected.pop_front();
   expected.pop_front();
   expected.push_front(first);
   ASSERT_EQ(expected, filtered_entries);
 }