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

content/browser/renderer_host/resource_dispatcher_host_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 "content/browser/renderer_host/resource_dispatcher_host.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/file_path.h"
@@ skipping 65 matching lines @@
   request.url = url;
   request.first_party_for_cookies = url;  // bypass third-party cookie blocking
   request.load_flags = 0;
   request.origin_pid = 0;
   request.resource_type = type;
   request.request_context = 0;
   request.appcache_host_id = appcache::kNoHostId;
   request.download_to_file = false;
   request.is_main_frame = true;
   request.frame_id = 0;
-  request.transition_type = PageTransition::LINK;
+  request.transition_type = content::PAGE_TRANSITION_LINK;
   return request;
 }
 
 // Spin up the message loop to kick off the request.
 static void KickOffRequest() {
   MessageLoop::current()->RunAllPending();
 }
 
 // We may want to move this to a shared space if it is useful for something else
 class ResourceIPCAccumulator {
@@ skipping 1151 matching lines @@
   net::URLRequestStatus status;
 
   void* iter = NULL;
   EXPECT_TRUE(IPC::ReadParam(&msgs[0][0], &iter, &request_id));
   EXPECT_TRUE(IPC::ReadParam(&msgs[0][0], &iter, &status));
 
   EXPECT_EQ(1, request_id);
   EXPECT_EQ(net::URLRequestStatus::FAILED, status.status());
   EXPECT_EQ(net::ERR_UNKNOWN_URL_SCHEME, status.error());
 }