Consolidate JNI registrations for mojo system.

content/app/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/chrome_build.gni")
 import("//build/config/features.gni")
 import("//ppapi/features/features.gni")
 
 # Implements "content_main" given the defines and visibility. On Windows this
 # is compiled with a different define for browser and child, but all code needs
@@ skipping 86 matching lines @@
   }
 
   source_set(main_target_name) {
     sources = [
       "content_service_manager_main_delegate.cc",
       "content_service_manager_main_delegate.h",
       "mojo/mojo_init.cc",
       "mojo/mojo_init.h",
     ]
 
+    configs += extra_configs
+    deps = content_app_deps + [
+             ":$runner_target_name",
+             "//ipc",
+             "//services/service_manager/embedder",
+           ]
+    forward_variables_from(invoker,
+                           [
+                             "defines",
+                             "visibility",
+                           ])
+
     if (is_android) {
       sources += [
         "android/app_jni_registrar.cc",
         "android/app_jni_registrar.h",
         "android/child_process_service_impl.cc",
         "android/child_process_service_impl.h",
         "android/content_jni_onload.cc",
         "android/content_main.cc",
         "android/content_main.h",
         "android/library_loader_hooks.cc",
         "android/library_loader_hooks.h",
       ]
+      deps += [ "//mojo/android:libsystem_java" ]
     } else {
       sources += [ "content_main.cc" ]
     }
-
-    configs += extra_configs
-    deps = content_app_deps + [
-             ":$runner_target_name",
-             "//ipc",
-             "//services/service_manager/embedder",
-           ]
-    forward_variables_from(invoker,
-                           [
-                             "defines",
-                             "visibility",
-                           ])
   }
 }
 
 group("content_app_browser_deps") {
   deps = [
     "//content/browser",
     "//content/public/browser:browser_sources",
   ]
 }
 
@@ skipping 45 matching lines @@
   }
 
   implement_content_app("child") {
     visibility = [ "//content/public/app:child" ]
     defines = [ "CHROME_MULTIPLE_DLL_CHILD" ]
     deps = [
       ":content_app_child_deps",
     ]
   }
 }