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

content/browser/frame_host/interstitial_page_impl.h

Index: content/browser/frame_host/interstitial_page_impl.h
diff --git a/content/browser/web_contents/interstitial_page_impl.h b/content/browser/frame_host/interstitial_page_impl.h
similarity index 97%
rename from content/browser/web_contents/interstitial_page_impl.h
rename to content/browser/frame_host/interstitial_page_impl.h
index 96de25afca9412a1f2cd212b0fa46c3cc516ab30..e387c9c982e3334cdf1026694f3dbb9bd12f0e18 100644
--- a/content/browser/web_contents/interstitial_page_impl.h
+++ b/content/browser/frame_host/interstitial_page_impl.h
@@ -2,13 +2,13 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef CONTENT_BROWSER_WEB_CONTENTS_INTERSTITIAL_PAGE_IMPL_H_
-#define CONTENT_BROWSER_WEB_CONTENTS_INTERSTITIAL_PAGE_IMPL_H_
+#ifndef CONTENT_BROWSER_FRAME_HOST_INTERSTITIAL_PAGE_IMPL_H_
+#define CONTENT_BROWSER_FRAME_HOST_INTERSTITIAL_PAGE_IMPL_H_
 
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
-#include "content/browser/renderer_host/frame_tree.h"
+#include "content/browser/frame_host/frame_tree.h"
 #include "content/browser/renderer_host/render_view_host_delegate.h"
 #include "content/browser/renderer_host/render_widget_host_delegate.h"
 #include "content/public/browser/interstitial_page.h"
@@ -264,4 +264,4 @@ class CONTENT_EXPORT InterstitialPageImpl
 
 }  // namespace content
 
-#endif  // CONTENT_BROWSER_WEB_CONTENTS_INTERSTITIAL_PAGE_IMPL_H_
+#endif  // CONTENT_BROWSER_FRAME_HOST_INTERSTITIAL_PAGE_IMPL_H_