Move navigation and frame tree classes to a new frame_host/ directory.

content/browser/frame_host/web_contents_screenshot_manager.cc

Index: content/browser/frame_host/web_contents_screenshot_manager.cc
diff --git a/content/browser/web_contents/web_contents_screenshot_manager.cc b/content/browser/frame_host/web_contents_screenshot_manager.cc
similarity index 97%
rename from content/browser/web_contents/web_contents_screenshot_manager.cc
rename to content/browser/frame_host/web_contents_screenshot_manager.cc
index d7becb5ddfed373ac5f893475f1cb45adf3d73a9..595cbd7c0711f9513715cb608c7603ef0151af9d 100644
--- a/content/browser/web_contents/web_contents_screenshot_manager.cc
+++ b/content/browser/frame_host/web_contents_screenshot_manager.cc
@@ -2,14 +2,13 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "content/browser/web_contents/web_contents_screenshot_manager.h"
+#include "content/browser/frame_host/web_contents_screenshot_manager.h"
 
 #include "base/command_line.h"
 #include "base/threading/worker_pool.h"
+#include "content/browser/frame_host/navigation_controller_impl.h"
+#include "content/browser/frame_host/navigation_entry_impl.h"
 #include "content/browser/renderer_host/render_view_host_impl.h"
-#include "content/browser/web_contents/navigation_controller_impl.h"
-#include "content/browser/web_contents/navigation_entry_impl.h"
-#include "content/browser/web_contents/web_contents_impl.h"
 #include "content/public/browser/render_widget_host.h"
 #include "content/public/browser/render_widget_host_view.h"
 #include "content/public/common/content_switches.h"