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

chrome/browser/ui/webui/options/advanced_options_utils_x11.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.
 
 #if !defined(OS_CHROMEOS)
 
 #include "chrome/browser/ui/webui/options/advanced_options_utils.h"
 
 #include "base/bind.h"
 #include "base/environment.h"
@@ skipping 24 matching lines @@
 namespace {
 
 // Show the proxy config URL in the given tab.
 void ShowLinuxProxyConfigUrl(TabContents* tab_contents) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   scoped_ptr<base::Environment> env(base::Environment::Create());
   const char* name = base::nix::GetDesktopEnvironmentName(env.get());
   if (name)
     LOG(ERROR) << "Could not find " << name << " network settings in $PATH";
   tab_contents->OpenURL(GURL(kLinuxProxyConfigUrl), GURL(),
-                        NEW_FOREGROUND_TAB, PageTransition::LINK);
+                        NEW_FOREGROUND_TAB, content::PAGE_TRANSITION_LINK);
 }
 
 // Start the given proxy configuration utility.
 bool StartProxyConfigUtil(TabContents* tab_contents, const char* command[]) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
   // base::LaunchProcess() returns true ("success") if the fork()
   // succeeds, but not necessarily the exec(). We'd like to be able to
   // use StartProxyConfigUtil() to search possible options and stop on
   // success, so we search $PATH first to predict whether the exec is
   // expected to succeed.
@@ skipping 74 matching lines @@
 
 }  // anonymous namespace
 
 void AdvancedOptionsUtilities::ShowNetworkProxySettings(
     TabContents* tab_contents) {
   BrowserThread::PostTask(BrowserThread::FILE, FROM_HERE,
       base::Bind(&DetectAndStartProxyConfigUtil, tab_contents));
 }
 
 #endif  // !defined(OS_CHROMEOS)