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

content/browser/renderer_host/render_view_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/test_render_view_host.h"
 #include "content/browser/tab_contents/navigation_controller.h"
 #include "content/browser/tab_contents/navigation_entry.h"
 #include "content/browser/tab_contents/test_tab_contents.h"
-#include "content/common/page_transition_types.h"
 #include "content/common/view_messages.h"
+#include "content/public/common/page_transition_types.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebDragOperation.h"
 #include "webkit/glue/webdropdata.h"
 
 class RenderViewHostTest : public RenderViewHostTestHarness {
 };
 
 // All about URLs reported by the renderer should get rewritten to about:blank.
 // See RenderViewHost::OnMsgNavigate for a discussion.
 TEST_F(RenderViewHostTest, FilterAbout) {
   rvh()->SendNavigate(1, GURL("about:cache"));
@@ skipping 20 matching lines @@
   // . go to a new page, preferably one that takes a while to resolve, such
   //   as one on a site that doesn't exist.
   //   . After this step is_waiting_for_unload_ack_ has been set to true on
   //     the first RVH.
   // . click stop before the page has been commited.
   // . click reload.
   //   . is_waiting_for_unload_ack_ is still true, and the if the hang monitor
   //     fires the tab gets closed.
 
   NavigateAndCommit(url1);
-  controller().LoadURL(url2, GURL(), PageTransition::LINK, std::string());
+  controller().LoadURL(
+      url2, GURL(), content::PAGE_TRANSITION_LINK, std::string());
   // Simulate the ClosePage call which is normally sent by the net::URLRequest.
   rvh()->ClosePage();
   // Needed so that navigations are not suspended on the RVH.
   rvh()->SendShouldCloseACK(true);
   contents()->Stop();
   controller().Reload(false);
   EXPECT_FALSE(rvh()->is_waiting_for_unload_ack_for_testing());
 }
 
 class MockDraggingRenderViewHostDelegateView
@@ skipping 114 matching lines @@
   // the code actually expects it to have at least one int para, this this
   // bogus message will not fail at de-serialization but should fail in
   // OnMsgInputEventAck() processing.
   IPC::Message message(0, ViewHostMsg_HandleInputEvent_ACK::ID,
                        IPC::Message::PRIORITY_NORMAL);
   rvh()->TestOnMessageReceived(message);
   EXPECT_EQ(1, process()->bad_msg_count());
 }
 
 #endif