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

chrome/browser/autocomplete/history_contents_provider_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/file_util.h"
 #include "base/path_service.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/autocomplete/autocomplete.h"
 #include "chrome/browser/autocomplete/autocomplete_match.h"
@@ skipping 59 matching lines @@
       // We need the ID scope and page ID so that the visit tracker can find it.
       // We just use the index for the page ID below.
       const void* id_scope = reinterpret_cast<void*>(1);
       GURL url(test_entries[i].url);
 
       // Add everything in order of time. We don't want to have a time that
       // is "right now" or it will nondeterministically appear in the results.
       Time t = Time::Now() - TimeDelta::FromDays(arraysize(test_entries) + i);
 
       history_service->AddPage(url, t, id_scope, i, GURL(),
-                               PageTransition::LINK, history::RedirectList(),
+                               content::PAGE_TRANSITION_LINK,
+                               history::RedirectList(),
                                history::SOURCE_BROWSED, false);
       history_service->SetPageTitle(url, UTF8ToUTF16(test_entries[i].title));
       history_service->SetPageContents(url, UTF8ToUTF16(test_entries[i].body));
     }
 
     provider_ = new HistoryContentsProvider(this, profile_.get(), BodyOnly());
   }
 
   virtual void TearDown() {
     provider_ = NULL;
@@ skipping 182 matching lines @@
                               true, AutocompleteInput::ALL_MATCHES);
   RunQuery(you_input, false);
   EXPECT_EQ(0U, matches().size());
 
   // Run a query that matches the bookmark
   RunQuery(input, false);
   EXPECT_EQ(1U, matches().size());
 }
 
 }  // namespace