Add a test runner for android_webview.

android_webview/javatests/src/org/chromium/android_webview/test/AndroidWebViewTestRunnerApplication.java

+package org.chromium.android_webview.test;
+
+import android.app.Application;
+
+import org.chromium.base.PathUtils;
+import org.chromium.content.app.LibraryLoader;
+import org.chromium.content.browser.ResourceExtractor;
+import org.chromium.content.common.CommandLine;
+
+import android.util.Log;
+
+public class AndroidWebViewTestRunnerApplication extends Application {
+
+    /**
+     * The name of the library to load.
+     */
+    private static final String NATIVE_LIBRARY = "webview";
+
+    /** The minimum set of .pak files Chrome needs. */
+    private static final String[] CHROME_MANDATORY_PAKS = {
+        "chrome.pak", "chrome_100_percent.pak", "en-US.pak", "resources.pak",
+    };
+
+    private static final String PRIVATE_DATA_DIRECTORY_SUFFIX = "webview";
+
+    @Override
+    public void onCreate() {
+        super.onCreate();
+        initializeApplicationParameters();
+    }
+
+    /** Handles initializing the common application parameters. */
+    private static void initializeApplicationParameters() {
+        CommandLine.initFromFile("/data/local/tmp/chrome-command-line");
+        PathUtils.setPrivateDataDirectorySuffix(PRIVATE_DATA_DIRECTORY_SUFFIX);
+        // We don't need to extract any paks because for WebView, they are
+        // in the system image.
+        ResourceExtractor.setMandatoryPaksToExtract(CHROME_MANDATORY_PAKS);
+        LibraryLoader.setLibraryToLoad(NATIVE_LIBRARY);
+        LibraryLoader.loadAndInitSync();
+    }
+}