Componentize IgnoreNavigationResourceThrottle and add chrome and webview specific implementations.

chrome/browser/component/navigation_interception/intercept_navigation_delegate.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_COMPONENT_NAVIGATION_INTERCEPTION_INTERCEPT_NAVIGATION_DELEGATE_H_
+#define CHROME_BROWSER_COMPONENT_NAVIGATION_INTERCEPTION_INTERCEPT_NAVIGATION_DELEGATE_H_
+
+#include "base/android/jni_helper.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/supports_user_data.h"
+
+class GURL;
+
+namespace content {
+class ResourceThrottle;
+class WebContents;
+}
+
+namespace net {
+class URLRequest;
+}
+
+namespace navigation_interception {
+
+// Native side of the InterceptNavigationDelegate Java interface.
+// This is used to create a InterceptNavigationResourceThrottle that calls the
+// Java interface method to determine whether a navigation should be ignored or
+// not.
+// To us this class:
+// 1) the Java-side interface implementation must be associated (via the
+//    Associate method) with a WebContents for which URLRequests are to be
+//    intercepted,
+// 2) the ResourceThrottle obtained via CreateThrottleFor must be associated
+//    with the URLRequests in the ResourceDispatcherHostDelegate
+//    implementation.
+class InterceptNavigationDelegate : public base::SupportsUserData::Data {
+ public:
+  InterceptNavigationDelegate(JNIEnv* env, jobject jdelegate);
+  virtual ~InterceptNavigationDelegate();
+
+  // Associates the InterceptNavigationDelegate with a WebContents using the
+  // SupportsUserData mechanism.
+  // As implied by the use of scoped_ptr, the WebContents will assume ownership
+  // of |delegate|.
+  static void Associate(content::WebContents* web_contents,
+                        scoped_ptr<InterceptNavigationDelegate> delegate);
+  // Gets the InterceptNavigationDelegate associated with the WebContents,
+  // can be null.
+  static InterceptNavigationDelegate* Get(content::WebContents* web_contents);
+
+  // Creates a InterceptNavigationResourceThrottle that will direct all
+  // callbacks to the InterceptNavigationDelegate.
+  static content::ResourceThrottle* CreateThrottleFor(
+      net::URLRequest* request);
+
+  virtual bool ShouldIgnoreNavigation(const GURL& url,
+                                      bool has_user_gesture);
+ private:
+  JavaObjectWeakGlobalRef weak_jdelegate_;
+};
+
+bool RegisterInterceptNavigationDelegate(JNIEnv* env);
+
+} // namespace navigation_interception
+
+#endif  // CHROME_BROWSER_COMPONENT_NAVIGATION_INTERCEPTION_INTERCEPT_NAVIGATION_DELEGATE_H_