<webview>: Implement declarativeWebRequest API

chrome/browser/extensions/api/declarative/rules_registry.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_RULES_REGISTRY_H__
 #define CHROME_BROWSER_EXTENSIONS_API_DECLARATIVE_RULES_REGISTRY_H__
 
 #include <string>
 #include <vector>
 
 #include "base/memory/linked_ptr.h"
 #include "base/memory/ref_counted.h"
 #include "chrome/common/extensions/api/events.h"
 #include "content/public/browser/browser_thread.h"
 
 namespace base {
 class DictionaryValue;
 }
 
 namespace extensions {
 
-class RulesRegistry;
-
 // Interface for rule registries.
 //
 // All functions except GetOwnerThread() and the destructor are only called on
 // the thread indicated by GetOwnerThread().
 class RulesRegistry : public base::RefCountedThreadSafe<RulesRegistry> {
  public:
   typedef extensions::api::events::Rule Rule;
+  typedef std::pair<int, int> WebViewKey;
 
   RulesRegistry(content::BrowserThread::ID owner_thread,
-                const std::string& event_name)
-      : owner_thread_(owner_thread), event_name_(event_name) {}
+                const std::string& event_name,
+                const WebViewKey& webview_key);
 
   // Registers |rules|, owned by |extension_id| to this RulesRegistry.
   // If a concrete RuleRegistry does not support some of the rules,
   // it may ignore them.
   //
   // |rules| is a list of Rule instances following the definition of the
   // declarative extension APIs. It is guaranteed that each rule in |rules| has
   // a unique name within the scope of |extension_id| that has not been
   // registered before, unless it has been removed again.
   // The ownership of rules remains with the caller.
@@ skipping 44 matching lines @@
   // and all rules of this extension need to be removed.
   virtual void OnExtensionUnloaded(const std::string& extension_id) = 0;
 
   // Returns the ID of the thread on which the rules registry lives.
   // It is safe to call this function from any thread.
   content::BrowserThread::ID owner_thread() const { return owner_thread_; }
 
   // The name of the event with which rules are registered.
   const std::string& event_name() const { return event_name_; }
 
+  // The key that identifies the webview (or tabs) in which these rules apply.
+  const WebViewKey& webview_key() const {
+    return webview_key_;
+  }
+
  protected:
-  virtual ~RulesRegistry() {}
+  virtual ~RulesRegistry();
 
  private:
   friend class base::RefCountedThreadSafe<RulesRegistry>;
 
   // The ID of the thread on which the rules registry lives.
   const content::BrowserThread::ID owner_thread_;
 
   // The name of the event with which rules are registered.
   const std::string event_name_;
 
+  // The key that identifies the context in which these rules apply.
+  WebViewKey webview_key_;
+
   DISALLOW_COPY_AND_ASSIGN(RulesRegistry);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_DECLARATIVE_RULES_REGISTRY_H__