Make android_apk template actually create an apk

build/config/android/config.gni

 # Copyright 2014 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.
 
 # This file contains common system config stuff for the Android build.
 
 if (is_android) {
   declare_args() {
     # Absolute directory containing the Android source code.
     android_src = ""
 
     android_sdk_root = "//third_party/android_tools/sdk"
     android_sdk_version = "20"
 
     # This is set when building the Android WebView inside the Android build
     # system, using the 'android' gyp backend. The WebView code is still built
     # when this is unset, but builds using the normal chromium build system.
     is_android_webview_build = false
+
+    android_default_keystore_path = "//build/android/ant/chromium-debug.keystore"
+    android_default_keystore_name = "chromiumdebugkey"
+    android_default_keystore_password = "chromium"
   }
 
   if (is_android_webview_build) {
     assert(android_src != "",
            "You must specify android_src for an Android WebView build.")
   }
 
+
   # Host stuff -----------------------------------------------------------------
 
   # Defines the name the Android build gives to the current host CPU
   # architecture, which is different than the names GN uses.
   if (build_cpu_arch == "x64") {
     android_host_arch = "x86_64"
   } else if (build_cpu_arch == "x86") {
     android_host_arch = "x86"
   } else {
     assert(false, "Need Android toolchain support for your build CPU arch.")
@@ skipping 19 matching lines @@
   android_ndk_root = "//third_party/android_tools/ndk"
 
   android_sdk = "${android_sdk_root}/platforms/android-${android_sdk_version}"
 
   android_sdk_tools = "${android_sdk_root}/tools"
   android_sdk_build_tools = "${android_sdk_root}/build-tools/20.0.0"
 
   # Path to the SDK's android.jar
   android_sdk_jar = "$android_sdk/android.jar"
 
+  zipalign_path = "$android_sdk_build_tools/zipalign"
+
   # Subdirectories inside android_ndk_root that contain the sysroot for the
   # associated platform.
   _android_api_level = 14
   x86_android_sysroot_subdir = "platforms/android-${_android_api_level}/arch-x86"
   arm_android_sysroot_subdir = "platforms/android-${_android_api_level}/arch-arm"
   mips_android_sysroot_subdir = "platforms/android-${_android_api_level}/arch-mips"
 
   # Toolchain root directory for each build. The actual binaries are inside
   # a "bin" directory inside of these.
   _android_toolchain_version = "4.8"
@@ skipping 44 matching lines @@
     android_app_abi = "mips"
   } else {
     assert(false, "Unknown Android ABI: " + cpu_arch)
   }
 } else {
   if (!defined(is_android_webview_build)) {
     is_android_webview_build = false
   }
   use_system_stlport = false
 }