Create ContentShellActivityTestRule and BaseJUnitRunner

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

Index: content/public/test/android/javatests/src/org/chromium/content/browser/test/NativeLibraryTestRule.java
diff --git a/content/public/test/android/javatests/src/org/chromium/content/browser/test/NativeLibraryTestRule.java b/content/public/test/android/javatests/src/org/chromium/content/browser/test/NativeLibraryTestRule.java
new file mode 100644
index 0000000000000000000000000000000000000000..1c75d4370fd71a592839de0faa05772cabbe6d04
--- /dev/null
+++ b/content/public/test/android/javatests/src/org/chromium/content/browser/test/NativeLibraryTestRule.java
@@ -0,0 +1,87 @@
+// Copyright 2017 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;
+
+import android.support.test.InstrumentationRegistry;
+
+import org.junit.Assert;
+import org.junit.rules.TestRule;
+import org.junit.runner.Description;
+import org.junit.runners.model.Statement;
+
+import org.chromium.base.PathUtils;
+import org.chromium.base.ThreadUtils;
+import org.chromium.base.library_loader.LibraryLoader;
+import org.chromium.base.library_loader.LibraryProcessType;
+import org.chromium.base.library_loader.ProcessInitException;
+import org.chromium.content.browser.BrowserStartupController;
+import org.chromium.content.browser.test.util.ApplicationUtils;
+
+/**
+ * TestRule that adds support for loading and dealing with native libraries.
+ */
+public class NativeLibraryTestRule implements TestRule {
+    private static final String PRIVATE_DATA_DIRECTORY_SUFFIX = "content";
+
+    /**
+     * Loads the native library on the activity UI thread (must not be called from the UI thread).
+     */
+    public void loadNativeLibraryNoBrowserProcess() {
+        handleNativeInitialization(false);
+    }
+
+    /**
+     * Loads the native library on the activity UI thread (must not be called from the UI thread).
+     * After loading the library, this will initialize the browser process.
+     */
+    public void loadNativeLibraryAndInitBrowserProcess() {
+        handleNativeInitialization(true);
+    }
+
+    private void handleNativeInitialization(final boolean initBrowserProcess) {
+        Assert.assertFalse(ThreadUtils.runningOnUiThread());
+
+        PathUtils.setPrivateDataDirectorySuffix(PRIVATE_DATA_DIRECTORY_SUFFIX);
+
+        ApplicationUtils.waitForLibraryDependencies(InstrumentationRegistry.getInstrumentation());
+
+        // LibraryLoader is not in general multithreaded; as other InstrumentationTestCase code
+        // (specifically, ChromeBrowserProvider) uses it from the main thread we must do
+        // likewise.
+        ThreadUtils.runOnUiThreadBlocking(new Runnable() {
+            @Override
+            public void run() {
+                nativeInitialization(initBrowserProcess);
+            }
+        });
+    }
+
+    private void nativeInitialization(boolean initBrowserProcess) {
+        if (initBrowserProcess) {
+            try {
+                BrowserStartupController.get(LibraryProcessType.PROCESS_BROWSER)
+                        .startBrowserProcessesSync(false);
+            } catch (ProcessInitException e) {
+                throw new Error(e);
+            }
+        } else {
+            try {
+                LibraryLoader.get(LibraryProcessType.PROCESS_BROWSER).ensureInitialized();
+            } catch (ProcessInitException e) {
+                throw new Error(e);
+            }
+        }
+    }
+
+    @Override
+    public Statement apply(Statement base, Description description) {
+        return new Statement() {
+            @Override
+            public void evaluate() throws Throwable {
+                base.evaluate();
+            }
+        };
+    }
+}