Add ExternalPrerenderRequestHandler and related API

chrome/android/javatests/src/org/chromium/chrome/browser/prerender/ExternalPrerenderRequestTest.java

Index: chrome/android/javatests/src/org/chromium/chrome/browser/prerender/ExternalPrerenderRequestTest.java
diff --git a/chrome/android/javatests/src/org/chromium/chrome/browser/prerender/ExternalPrerenderRequestTest.java b/chrome/android/javatests/src/org/chromium/chrome/browser/prerender/ExternalPrerenderRequestTest.java
new file mode 100644
index 0000000000000000000000000000000000000000..43bbaf4bd66d6fd15c8c9272b273a319d1c045a2
--- /dev/null
+++ b/chrome/android/javatests/src/org/chromium/chrome/browser/prerender/ExternalPrerenderRequestTest.java
@@ -0,0 +1,63 @@
+// Copyright 2013 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.prerender;
+
+import android.test.suitebuilder.annotation.SmallTest;
+
+import org.chromium.base.ThreadUtils;
+import org.chromium.base.test.util.Feature;
+import org.chromium.chrome.browser.profiles.Profile;
+import org.chromium.chrome.test.util.TestHttpServerClient;
+import org.chromium.chrome.testshell.ChromiumTestShellTestBase;
+
+import java.util.concurrent.Callable;
+import java.util.concurrent.ExecutionException;
+
+/**
+ * Tests for adding and removing prerenders using the {@link ExternalPrerenderHandler}
+ */
+public class ExternalPrerenderRequestTest extends ChromiumTestShellTestBase {
+    private static final String GOOGLE_URL =
+            TestHttpServerClient.getUrl("clank/test/data/android/prerender/google.html");
+    private ExternalPrerenderHandler mHandler;
+    @Override
+    public void setUp() throws Exception {
+        super.setUp();
+        clearAppData();
+        launchChromiumTestShellWithBlankPage();
+        assertTrue(waitForActiveShellToBeDoneLoading());
+        mHandler = new ExternalPrerenderHandler();
+    }
+
+    @SmallTest
+    @Feature({"Prerender"})
+    public void testAddPrerender() throws ExecutionException {

[cbentzel, 2013/11/01 20:23:29]

I think you need to add more tests...

- Multiple Adds in a row
- Cancel without an Add
- Add, Cancel, Add
- What happens if a prerender can't be done when calling AddPrerender?

[Yusuf, 2013/11/04 22:27:49]

Done.

+        final Callable<Profile> profileCallable = new Callable<Profile>() {
+            @Override
+            public Profile call() throws Exception {
+                return Profile.getLastUsedProfile();
+            }
+        };
+        final Profile profile = ThreadUtils.runOnUiThreadBlocking(profileCallable);
+        final Callable<Integer> addCallable = new Callable<Integer>() {
+            @Override
+            public Integer call() throws Exception {
+                return mHandler.addPrerender(profile, GOOGLE_URL, "", 0, 0);
+            }
+        };
+        int webContentsPtr = ThreadUtils.runOnUiThreadBlocking(addCallable);
+        assertTrue(ExternalPrerenderHandler.hasPrerenderedUrl(
+                profile, GOOGLE_URL, webContentsPtr));
+        final Runnable cancelRunnable = new Runnable() {
+            @Override
+            public void run() {
+                mHandler.cancelCurrentPrerender();
+            }
+        };
+        ThreadUtils.runOnUiThreadBlocking(cancelRunnable);
+        assertFalse(ExternalPrerenderHandler.hasPrerenderedUrl(
+                profile, GOOGLE_URL, webContentsPtr));
+    }
+}