[Android WebView] Terminate execution of stuck JS code on navigation requests

android_webview/java/src/org/chromium/android_webview/AwContents.java

 // Copyright 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.android_webview;
 
 import android.annotation.SuppressLint;
 import android.app.Activity;
 import android.content.ComponentCallbacks2;
 import android.content.Context;
@@ skipping 1009 matching lines @@
     }
 
     /**
      * Load url without fixing up the url string. Consumers of ContentView are responsible for
      * ensuring the URL passed in is properly formatted (i.e. the scheme has been added if left
      * off during user input).
      *
      * @param params Parameters for this load.
      */
     public void loadUrl(LoadUrlParams params) {
+        if (mNativeAwContents == 0) return;
+
         if (params.getLoadUrlType() == LoadUrlParams.LOAD_TYPE_DATA &&
                 !params.isBaseUrlDataScheme()) {
             // This allows data URLs with a non-data base URL access to file:///android_asset/ and
             // file:///android_res/ URLs. If AwSettings.getAllowFileAccess permits, it will also
             // allow access to file:// URLs (subject to OS level permission checks).
             params.setCanLoadLocalResources(true);
         }
 
         // If we are reloading the same url, then set transition type as reload.
         if (params.getUrl() != null &&
@@ skipping 18 matching lines @@
         if (extraHeaders != null) {
             for (String header : extraHeaders.keySet()) {
                 if (REFERER.equals(header.toLowerCase(Locale.US))) {
                     params.setReferrer(new Referrer(extraHeaders.remove(header), 1));
                     params.setExtraHeaders(extraHeaders);
                     break;
                 }
             }
         }
 
-        if (mNativeAwContents != 0) {
-            nativeSetExtraHeadersForUrl(
-                    mNativeAwContents, params.getUrl(), params.getExtraHttpRequestHeadersString());
-        }
+        nativeSetExtraHeadersForUrl(
+                mNativeAwContents, params.getUrl(), params.getExtraHttpRequestHeadersString());
         params.setExtraHeaders(new HashMap<String, String>());
 
+        nativeSendCheckRenderThreadResponsiveness(mNativeAwContents);
         mContentViewCore.loadUrl(params);
 
         // The behavior of WebViewClassic uses the populateVisitedLinks callback in WebKit.
         // Chromium does not use this use code path and the best emulation of this behavior to call
         // request visited links once on the first URL load of the WebView.
         if (!mHasRequestedVisitedHistoryFromClient) {
             mHasRequestedVisitedHistoryFromClient = true;
             requestVisitedHistoryFromClient();
         }
 
@@ skipping 1367 matching lines @@
     private native long nativeReleasePopupAwContents(long nativeAwContents);
     private native void nativeFocusFirstNode(long nativeAwContents);
     private native void nativeSetBackgroundColor(long nativeAwContents, int color);
 
     private native long nativeGetAwDrawGLViewContext(long nativeAwContents);
     private native long nativeCapturePicture(long nativeAwContents, int width, int height);
     private native void nativeEnableOnNewPicture(long nativeAwContents, boolean enabled);
     private native void nativeClearView(long nativeAwContents);
     private native void nativeSetExtraHeadersForUrl(long nativeAwContents,
             String url, String extraHeaders);
+    private native void nativeSendCheckRenderThreadResponsiveness(long nativeAwContents);
 
     private native void nativeInvokeGeolocationCallback(
             long nativeAwContents, boolean value, String requestingFrame);
 
     private native void nativeSetJsOnlineProperty(long nativeAwContents, boolean networkUp);
 
     private native void nativeTrimMemory(long nativeAwContents, int level, boolean visible);
 
     private native void nativeCreatePdfExporter(long nativeAwContents, AwPdfExporter awPdfExporter);
 
     private native void nativePreauthorizePermission(long nativeAwContents, String origin,
             long resources);
 }