Add a standalone SkyShell.apk for testing

sky/shell/sky_main.cc

+// Copyright 2015 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.
+
+#include "sky/shell/sky_main.h"
+
+#include "base/android/jni_android.h"
+#include "base/android/jni_array.h"
+#include "base/android/jni_string.h"
+#include "base/at_exit.h"
+#include "base/bind.h"
+#include "base/command_line.h"
+#include "base/lazy_instance.h"
+#include "base/logging.h"
+#include "base/macros.h"
+#include "base/message_loop/message_loop.h"
+#include "base/run_loop.h"
+#include "base/threading/simple_thread.h"
+#include "jni/SkyMain_jni.h"
+
+using base::LazyInstance;
+
+namespace sky {
+namespace shell {
+
+namespace {
+
+LazyInstance<scoped_ptr<base::MessageLoop>> g_java_message_loop =
+    LAZY_INSTANCE_INITIALIZER;
+
+LazyInstance<base::android::ScopedJavaGlobalRef<jobject>> g_main_activiy =
+    LAZY_INSTANCE_INITIALIZER;
+
+void InitializeLogging() {
+  logging::LoggingSettings settings;
+  settings.logging_dest = logging::LOG_TO_SYSTEM_DEBUG_LOG;
+  logging::InitLogging(settings);
+  // To view log output with IDs and timestamps use "adb logcat -v threadtime".
+  logging::SetLogItems(false,   // Process ID
+                       false,   // Thread ID
+                       false,   // Timestamp
+                       false);  // Tick count
+}
+
+}  // namespace
+
+static void Init(JNIEnv* env,
+                 jclass clazz,
+                 jobject activity) {
+  g_main_activiy.Get().Reset(env, activity);
+
+  base::android::ScopedJavaLocalRef<jobject> scoped_activity(env, activity);
+  base::android::InitApplicationContext(env, scoped_activity);
+
+  base::CommandLine::Init(0, nullptr);
+
+  InitializeLogging();
+
+  g_java_message_loop.Get().reset(new base::MessageLoopForUI);
+  base::MessageLoopForUI::current()->Start();
+}
+
+static jboolean Start(JNIEnv* env, jclass clazz) {
+  LOG(INFO) << "Native code started!";
+  return true;
+}
+
+bool RegisterSkyMain(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}
+
+}  // namespace sky
+}  // namespace mojo