Move extensions bindings code out of //chrome

chrome/renderer/extensions/content_watcher.h

-// Copyright (c) 2012 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.
-
-#ifndef CHROME_RENDERER_EXTENSIONS_CONTENT_WATCHER_H_
-#define CHROME_RENDERER_EXTENSIONS_CONTENT_WATCHER_H_
-
-#include <map>
-#include <set>
-#include <string>
-#include <vector>
-
-#include "third_party/WebKit/public/platform/WebVector.h"
-
-namespace blink {
-class WebFrame;
-class WebString;
-}
-
-namespace extensions {
-class Dispatcher;
-class Extension;
-class NativeHandler;
-
-// Watches the content of WebFrames to notify extensions when they match various
-// patterns.  This class tracks the set of relevant patterns (set by
-// ExtensionMsg_WatchPages) and the set that match on each WebFrame, and sends a
-// ExtensionHostMsg_OnWatchedPageChange whenever a RenderView's set changes.
-//
-// There's one ContentWatcher per Dispatcher rather than per RenderView because
-// WebFrames can move between RenderViews through adoptNode.
-class ContentWatcher {
- public:
-  ContentWatcher();
-  ~ContentWatcher();
-
-  // Handler for ExtensionMsg_WatchPages.
-  void OnWatchPages(const std::vector<std::string>& css_selectors);
-
-  // Uses WebDocument::watchCSSSelectors to watch the selectors in
-  // css_selectors_ and get a callback into DidMatchCSS() whenever the set of
-  // matching selectors in |frame| changes.
-  void DidCreateDocumentElement(blink::WebFrame* frame);
-
-  // Records that |newly_matching_selectors| have started matching on |*frame|,
-  // and |stopped_matching_selectors| have stopped matching.
-  void DidMatchCSS(
-      blink::WebFrame* frame,
-      const blink::WebVector<blink::WebString>& newly_matching_selectors,
-      const blink::WebVector<blink::WebString>& stopped_matching_selectors);
-
- private:
-  // Given that we saw a change in the CSS selectors that |changed_frame|
-  // matched, tell the browser about the new set of matching selectors in its
-  // top-level page.  We filter this so that if an extension were to be granted
-  // activeTab permission on that top-level page, we only send CSS selectors for
-  // frames that it could run on.
-  void NotifyBrowserOfChange(blink::WebFrame* changed_frame) const;
-
-  // If any of these selectors match on a page, we need to send an
-  // ExtensionHostMsg_OnWatchedPageChange back to the browser.
-  blink::WebVector<blink::WebString> css_selectors_;
-
-  // Maps live WebFrames to the set of CSS selectors they match. Blink sends
-  // back diffs, which we apply to these sets.
-  std::map<blink::WebFrame*, std::set<std::string> > matching_selectors_;
-};
-
-}  // namespace extensions
-
-#endif  // CHROME_RENDERER_EXTENSIONS_CONTENT_WATCHER_H_