Implemented declarative redirects to transparent image and empty document.

chrome/browser/extensions/api/declarative_webrequest/webrequest_action.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_BROWSER_EXTENSIONS_API_DECLARATIVE_WEBREQUEST_WEBREQUEST_ACTION_H_
 #define CHROME_BROWSER_EXTENSIONS_API_DECLARATIVE_WEBREQUEST_WEBREQUEST_ACTION_H_
 #pragma once
 
 #include <list>
 #include <string>
@@ skipping 25 matching lines @@
     LinkedPtrEventResponseDelta;
 
 // Base class for all WebRequestActions of the declarative Web Request API.
 //
 // TODO(battre): Add method that corresponds to executing the action.
 class WebRequestAction {
  public:
   // Type identifiers for concrete WebRequestActions.
   enum Type {
     ACTION_CANCEL_REQUEST,
-    ACTION_REDIRECT_REQUEST
+    ACTION_REDIRECT_REQUEST,
+    ACTION_REDIRECT_TO_TRANSPARENT_IMAGE,
+    ACTION_REDIRECT_TO_EMPTY_DOCUMENT,
   };
 
   WebRequestAction();
   virtual ~WebRequestAction();
 
   // Returns a bit vector representing extensions::RequestStages. The bit vector
   // contains a 1 for each request stage during which the condition can be
   // tested.
   virtual int GetStages() const = 0;
 
@@ skipping 87 matching lines @@
       RequestStages request_stage,
       const std::string& extension_id,
       const base::Time& extension_install_time) const OVERRIDE;
 
  private:
   GURL redirect_url_;  // Target to which the request shall be redirected.
 
   DISALLOW_COPY_AND_ASSIGN(WebRequestRedirectAction);
 };
 
+// Action that instructs to redirect a network request to a transparent image.
+class WebRequestRedirectToTransparentImageAction : public WebRequestAction {
+ public:
+  explicit WebRequestRedirectToTransparentImageAction();
+  virtual ~WebRequestRedirectToTransparentImageAction();
+
+  // Implementation of WebRequestAction:
+  virtual int GetStages() const OVERRIDE;
+  virtual Type GetType() const OVERRIDE;
+  virtual LinkedPtrEventResponseDelta CreateDelta(
+      net::URLRequest* request,
+      RequestStages request_stage,
+      const std::string& extension_id,
+      const base::Time& extension_install_time) const OVERRIDE;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(WebRequestRedirectToTransparentImageAction);
+};
+
+
+// Action that instructs to redirect a network request to an empty document.
+class WebRequestRedirectToEmptyDocumentAction : public WebRequestAction {
+ public:
+  explicit WebRequestRedirectToEmptyDocumentAction();
+  virtual ~WebRequestRedirectToEmptyDocumentAction();
+
+  // Implementation of WebRequestAction:
+  virtual int GetStages() const OVERRIDE;
+  virtual Type GetType() const OVERRIDE;
+  virtual LinkedPtrEventResponseDelta CreateDelta(
+      net::URLRequest* request,
+      RequestStages request_stage,
+      const std::string& extension_id,
+      const base::Time& extension_install_time) const OVERRIDE;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(WebRequestRedirectToEmptyDocumentAction);
+};
+
 // TODO(battre) Implement further actions:
 // Redirect to constant url, Redirect by RegEx, Set header, Remove header, ...
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_DECLARATIVE_WEBREQUEST_WEBREQUEST_ACTION_H_