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

chrome/browser/history/history_querying_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 "base/basictypes.h"
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/path_service.h"
@@ skipping 94 matching lines @@
     for (size_t i = 0; i < arraysize(test_entries); i++) {
       test_entries[i].time =
           now - (test_entries[i].days_ago * TimeDelta::FromDays(1));
 
       // We need the ID scope and page ID so that the visit tracker can find it.
       const void* id_scope = reinterpret_cast<void*>(1);
       int32 page_id = i;
       GURL url(test_entries[i].url);
 
       history_->AddPage(url, test_entries[i].time, id_scope, page_id, GURL(),
-                        PageTransition::LINK, history::RedirectList(),
+                        content::PAGE_TRANSITION_LINK, history::RedirectList(),
                         history::SOURCE_BROWSED, false);
       history_->SetPageTitle(url, UTF8ToUTF16(test_entries[i].title));
       history_->SetPageContents(url, UTF8ToUTF16(test_entries[i].body));
     }
   }
 
   virtual void TearDown() {
     if (history_.get()) {
       history_->SetOnBackendDestroyTask(new MessageLoop::QuitTask);
       history_->Cleanup();
@@ skipping 218 matching lines @@
   QueryOptions options;
   QueryResults results;
 
   QueryHistory("Other", options, &results);
   EXPECT_EQ(1, results.urls().size());
   EXPECT_TRUE(NthResultIs(results, 0, 4));
 }
 */
 
 }  // namespace history