Move //webapk to //chrome/android/webapk

chrome/android/webapk/libs/client/BUILD.gn

 # Copyright 2016 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.
 
 import("//build/config/android/rules.gni")
-import("//webapk/libs/runtime_library_version.gni")
+import("//chrome/android/webapk/libs/runtime_library_version.gni")
 
 android_library("client") {
   java_files = [
     "src/org/chromium/webapk/lib/client/DexOptimizer.java",
     "src/org/chromium/webapk/lib/client/WebApkStateParams.java",
     "src/org/chromium/webapk/lib/client/NavigationClient.java",
     "src/org/chromium/webapk/lib/client/NotificationBuilderDelegate.java",
     "src/org/chromium/webapk/lib/client/NotificationClient.java",
     "src/org/chromium/webapk/lib/client/WebApkValidator.java",
     "src/org/chromium/webapk/lib/client/WebApkSwitches.java",
     "src/org/chromium/webapk/lib/client/WebApkVersionManager.java",
   ]
   deps = [
     "//base:base_java",
+    "//chrome/android/webapk/libs/common",
     "//third_party/android_tools:android_support_v13_java",
-    "//webapk/libs/common",
   ]
   srcjar_deps = [
     ":runtime_library_version_java",
-    "//webapk/libs/runtime_library:webapk_service_aidl",
+    "//chrome/android/webapk/libs/runtime_library:webapk_service_aidl",
   ]
 }
 
 java_cpp_template("runtime_library_version_java") {
   package_name = "org/chromium/webapk/lib/client"
   sources = [
     "src/org/chromium/webapk/lib/client/WebApkVersion.template",
   ]
   defines = [ "CURRENT_RUNTIME_DEX_VERSION_VALUE=$runtime_library_version" ]
 }