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

content/browser/tab_contents/test_tab_contents.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/tab_contents/test_tab_contents.h"
 
 #include <utility>
 
 #include "content/browser/browser_url_handler.h"
 #include "content/browser/renderer_host/mock_render_process_host.h"
 #include "content/browser/renderer_host/render_view_host.h"
 #include "content/browser/renderer_host/test_render_view_host.h"
 #include "content/browser/site_instance.h"
-#include "content/common/page_transition_types.h"
+#include "content/public/common/page_transition_types.h"
 
 TestTabContents::TestTabContents(content::BrowserContext* browser_context,
                                  SiteInstance* instance)
     : TabContents(browser_context, instance, MSG_ROUTING_NONE, NULL, NULL),
       transition_cross_site(false),
       delegate_view_override_(NULL),
       expect_set_history_length_and_prune_(false),
       expect_set_history_length_and_prune_site_instance_(NULL),
       expect_set_history_length_and_prune_history_length_(0),
       expect_set_history_length_and_prune_min_page_id_(-1) {
@@ skipping 15 matching lines @@
 }
 
 TabContents* TestTabContents::Clone() {
   TabContents* tc = new TestTabContents(
       browser_context(), SiteInstance::CreateSiteInstance(browser_context()));
   tc->controller().CopyStateFrom(controller_);
   return tc;
 }
 
 void TestTabContents::NavigateAndCommit(const GURL& url) {
-  controller().LoadURL(url, GURL(), PageTransition::LINK, std::string());
+  controller().LoadURL(
+      url, GURL(), content::PAGE_TRANSITION_LINK, std::string());
   GURL loaded_url(url);
   bool reverse_on_redirect = false;
   BrowserURLHandler::GetInstance()->RewriteURLIfNecessary(
       &loaded_url, browser_context(), &reverse_on_redirect);
 
   // LoadURL created a navigation entry, now simulate the RenderView sending
   // a notification that it actually navigated.
   CommitPendingNavigation();
 }
 
@@ skipping 49 matching lines @@
 
 void TestTabContents::SetHistoryLengthAndPrune(
     const SiteInstance* site_instance, int history_length, int32 min_page_id) {
   EXPECT_TRUE(expect_set_history_length_and_prune_);
   expect_set_history_length_and_prune_ = false;
   EXPECT_EQ(expect_set_history_length_and_prune_site_instance_, site_instance);
   EXPECT_EQ(expect_set_history_length_and_prune_history_length_,
             history_length);
   EXPECT_EQ(expect_set_history_length_and_prune_min_page_id_, min_page_id);
 }