Componentize IgnoreNavigationResourceThrottle and add chrome and webview specific implementations.

chrome/browser/component/navigation_interception/java/src/org/chromium/chrome/browser/component/navigation_interception/InterceptNavigationDelegate.java

Index: chrome/browser/component/navigation_interception/java/src/org/chromium/chrome/browser/component/navigation_interception/InterceptNavigationDelegate.java
diff --git a/chrome/browser/component/navigation_interception/java/src/org/chromium/chrome/browser/component/navigation_interception/InterceptNavigationDelegate.java b/chrome/browser/component/navigation_interception/java/src/org/chromium/chrome/browser/component/navigation_interception/InterceptNavigationDelegate.java
new file mode 100644
index 0000000000000000000000000000000000000000..5eae733f42b287191944ac2a2cea945d76f42d7b
--- /dev/null
+++ b/chrome/browser/component/navigation_interception/java/src/org/chromium/chrome/browser/component/navigation_interception/InterceptNavigationDelegate.java
@@ -0,0 +1,21 @@
+// 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.
+
+package org.chromium.chrome.browser.component.navigation_interception;
+
+import org.chromium.base.CalledByNative;
+
+public interface InterceptNavigationDelegate {
+    /**
+     * This method is called for every top-level navigation within the associated WebContents.
+     * The method allows the embedder to ignore navigations. This is used on Android to 'convert'
+     * certain navigations to Intents to 3rd party applications.
+     *
+     * @param url the target url of the navigation.
+     * @param isContentInitiated true if the navigation was initiated by the user.

[joth, 2012/10/03 22:01:32]

nit: isContentInitiated -> isUserGesture 

or is this consistent with existing java-land terminology?

[mkosiba (inactive), 2012/10/08 15:09:12]

good find! thanks!

+     * @return true if the navigation should be ignored.
+     */
+    @CalledByNative
+    boolean shouldIgnoreNavigation(String url, boolean isContentInitiated);
+}