Initial CL for talking to the WebAPK server to generate WebAPK

chrome/android/java/src/org/chromium/chrome/browser/webapps/WebApkBuilder.java

Index: chrome/android/java/src/org/chromium/chrome/browser/webapps/WebApkBuilder.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebApkBuilder.java b/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebApkBuilder.java
index 41514368cd1a9e02125c9d5e1fc7b4e8451edd58..8cb8ef455ee916c437312f237f760fc90d8dd555 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebApkBuilder.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebApkBuilder.java
@@ -4,31 +4,34 @@
 
 package org.chromium.chrome.browser.webapps;
 
-import android.graphics.Bitmap;
+import android.content.Context;
+
+import org.chromium.base.ContextUtils;
+import org.chromium.base.annotations.CalledByNative;
+import org.chromium.chrome.browser.ChromeApplication;
 
 /**
- * Interface for building WebAPKs.
+ * Java counterpart to webapk_builder.h
+ * Contains functionality to download and install WebAPKs.
  */
-public interface WebApkBuilder {
+public class WebApkBuilder {
+    // Prevent instantiation.
+    private WebApkBuilder() {}
+
     /**
-     * Asynchronously build WebAPK.
-     * @param startUrl        The url that the WebAPK should navigate to when launched from the app
-     *                        list.
-     * @param scope           Navigations from the WebAPK to URLs with sub-origin {@link scope} will
-     *                        stay within the WebAPK.
-     * @param name            "name" from the Web Manifest.
-     * @param shortName       "short_name" from the Web Manifest.
-     * @param iconUrl         Url of the icon for the app list. Url of the favicon if the Web
-     *                        Manifest does not specify an icon.
-     * @param icon            Icon for the app list. Generated icon or favicon if the Web Manifest
-     *                        does not specify an icon.
-     * @param displayMode     "display" from the Web Manifest.
-     * @param orientation     "orientation" from the Web Manifest.
-     * @param themeColor      "theme_color" from the Web Manifest.
-     * @param backgroundColor "background_color" from the Web Manifest.
-     * @param manifestUrl     The URL of the Web Manifest.
+     * Downloads and installs a WebAPK.
+     * @param signedMarketUrl Url to provide to Google Play.
+     * @return True if the download was started. A "true" return value does not guarantee that the
+     * download succeeds.
      */
-    void buildWebApkAsync(String startUrl, String scope, String name, String shortName,
-            String iconUrl, Bitmap icon, int displayMode, int orientation, long themeColor,
-            long backgroundColor, String manifestUrl);
+    @CalledByNative
+    static boolean downloadAndInstallAsync(String signedMarketUrl) {
+        Context context = ContextUtils.getApplicationContext();
+        WebApkInstaller apkInstaller = ((ChromeApplication) context).createWebApkInstaller();
+        if (apkInstaller == null) {
+            return false;
+        }
+        apkInstaller.downloadAndInstallAsync(signedMarketUrl);
+        return true;
+    }
 }