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

content/browser/frame_host/web_contents_screenshot_manager.h

Index: content/browser/frame_host/web_contents_screenshot_manager.h
diff --git a/content/browser/web_contents/web_contents_screenshot_manager.h b/content/browser/frame_host/web_contents_screenshot_manager.h
similarity index 90%
rename from content/browser/web_contents/web_contents_screenshot_manager.h
rename to content/browser/frame_host/web_contents_screenshot_manager.h
index 23df41ee757a1c9eb87ee0a0960b6cbd519e9e89..d76dfae8b5145637b6ad88d739ec2e27cfe38ae5 100644
--- a/content/browser/web_contents/web_contents_screenshot_manager.h
+++ b/content/browser/frame_host/web_contents_screenshot_manager.h
@@ -2,8 +2,8 @@
 // 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_WEB_CONTENTS_SCREENSHOT_MANAGER_H_
-#define CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_SCREENSHOT_MANAGER_H_
+#ifndef CONTENT_BROWSER_FRAME_HOST_WEB_CONTENTS_SCREENSHOT_MANAGER_H_
+#define CONTENT_BROWSER_FRAME_HOST_WEB_CONTENTS_SCREENSHOT_MANAGER_H_
 
 #include "base/compiler_specific.h"
 #include "base/memory/weak_ptr.h"
@@ -23,6 +23,8 @@ class ScreenshotData;
 // current navigation entry of a NavigationControllerImpl, and managing these
 // captured images. These image-captures are used for history navigation using
 // overscroll gestures.
+// TODO(nasko): Rename this to better reflect that it is used for
+// navigation entries and not WebContents.
 class CONTENT_EXPORT WebContentsScreenshotManager {
  public:
   explicit WebContentsScreenshotManager(NavigationControllerImpl* controller);
@@ -86,4 +88,4 @@ class CONTENT_EXPORT WebContentsScreenshotManager {
 
 }  // namespace content
 
-#endif  // CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_SCREENSHOT_MANAGER_H_
+#endif  // CONTENT_BROWSER_FRAME_HOST_WEB_CONTENTS_SCREENSHOT_MANAGER_H_