Add WebAPK's tests in ChildProcessLauncherTest.

content/public/android/BUILD.gn

 # 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.
 
 import("//build/config/android/config.gni")
 import("//build/config/android/rules.gni")
 
 content_jni_gypi_values = exec_script("//build/gypi_to_gn.py",
                                       [ rebase_path("../../content_jni.gypi") ],
                                       "scope",
@@ skipping 311 matching lines @@
     "//net/android:net_java",
     "//net/android:net_java_test_support",
     "//third_party/android_tools:android_support_v13_java",
     "//third_party/android_tools:legacy_http_javalib",
     "//ui/android:ui_java",
   ]
 
   java_files = [
     "javatests/src/org/chromium/content/browser/AddressDetectionTest.java",
     "javatests/src/org/chromium/content/browser/BrowserStartupControllerTest.java",
-    "javatests/src/org/chromium/content/browser/ChildProcessLauncherTest.java",
     "javatests/src/org/chromium/content/browser/ClickListenerTest.java",
     "javatests/src/org/chromium/content/browser/ClipboardTest.java",
     "javatests/src/org/chromium/content/browser/ContentCommandLineTest.java",
     "javatests/src/org/chromium/content/browser/ContentDetectionTestBase.java",
     "javatests/src/org/chromium/content/browser/ContentViewCoreFocusTest.java",
     "javatests/src/org/chromium/content/browser/ContentViewCoreSelectionTest.java",
     "javatests/src/org/chromium/content/browser/ContentViewCoreViewAndroidDelegateTest.java",
     "javatests/src/org/chromium/content/browser/ContentViewLocationTest.java",
     "javatests/src/org/chromium/content/browser/ContentViewPopupZoomerTest.java",
     "javatests/src/org/chromium/content/browser/ContentViewScrollingTest.java",
@@ skipping 50 matching lines @@
   java_files = [
     "junit/src/org/chromium/content/browser/input/GamepadMappingsTest.java",
     "junit/src/org/chromium/content/browser/BindingManagerImplTest.java",
   ]
   deps = [
     ":content_java",
     "//base:base_java",
     "//base:base_java_test_support",
   ]
 }