[Android] Upstream content detection and ChromeBrowserProvider tests.

content/public/test/android/javatests/src/org/chromium/content/browser/test/util/JavaScriptUtils.java

Index: content/public/test/android/javatests/src/org/chromium/content/browser/test/util/JavaScriptUtils.java
diff --git a/content/public/test/android/javatests/src/org/chromium/content/browser/test/util/JavaScriptUtils.java b/content/public/test/android/javatests/src/org/chromium/content/browser/test/util/JavaScriptUtils.java
new file mode 100644
index 0000000000000000000000000000000000000000..49e8c184ebdead5b5032dc0d8d24009b8e54e3cf
--- /dev/null
+++ b/content/public/test/android/javatests/src/org/chromium/content/browser/test/util/JavaScriptUtils.java
@@ -0,0 +1,53 @@
+// 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.content.browser.test.util;
+
+import android.test.InstrumentationTestCase;
+
+import junit.framework.Assert;
+
+import org.chromium.content.browser.ContentView;
+
+/**
+ * Collection of JavaScript utilities.
+ */
+public class JavaScriptUtils {
+    private static int mRequestId;
+
+    /**
+     * Executes the given snippet of JavaScript code within the given ContentView. Returns the
+     * result of its execution in JSON format.
+     */
+    public static String executeJavaScriptAndWaitForResult(InstrumentationTestCase test,
+            final ContentView view, TestCallbackHelperContainer viewClient, final String code)
+                    throws Throwable {
+        TestCallbackHelperContainer.OnEvaluateJavaScriptResultHelper
+                onEvaluateJavaScriptResultHelper = viewClient.getOnEvaluateJavaScriptResultHelper();
+        int currentCallCount = onEvaluateJavaScriptResultHelper.getCallCount();
+        test.runTestOnUiThread(new Runnable() {
+            @Override
+            public void run() {
+                mRequestId = view.evaluateJavaScript(code);
+            }
+        });
+        onEvaluateJavaScriptResultHelper.waitForCallback(currentCallCount);
+        Assert.assertEquals("Response ID mismatch when evaluating JavaScript.",
+                mRequestId, onEvaluateJavaScriptResultHelper.getId());
+        return onEvaluateJavaScriptResultHelper.getJsonResult();
+    }
+
+    /**
+     * Executes the given snippet of JavaScript code but does not wait for the result.
+     */
+    public static void executeJavaScript(InstrumentationTestCase test, final ContentView view,
+            final String code) throws Throwable {
+        test.runTestOnUiThread(new Runnable() {
+            @Override
+            public void run() {
+                view.evaluateJavaScript(code);
+            }
+        });
+    }
+}