Add BlimpClientContext and factory with real and dummy implementation

blimp/client/core/dummy_blimp_client_context.cc

+// 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.
+
+#include "blimp/client/core/dummy_blimp_client_context.h"
+
+#include "base/memory/ptr_util.h"
+#include "base/supports_user_data.h"
+#include "blimp/client/public/blimp_client_context_delegate.h"
+
+#if defined(OS_ANDROID)
+#include "blimp/client/core/android/dummy_blimp_client_context_android.h"
+#endif  // OS_ANDROID
+
+namespace blimp {
+namespace client {
+
+namespace {
+
+#if defined(OS_ANDROID)
+const char kDummyBlimpClientContextAndroidKey[] =
+    "dummy_blimp_client_context_android";
+#endif  // OS_ANDROID
+}
+
+// This function is declared in //blimp/client/public/blimp_client_context.h,
+// and either this function or the one in
+// //blimp/client/core/blimp_client_context_impl.cc should be linked in to
+// any binary using BlimpClientContext::Create.
+// static
+BlimpClientContext* BlimpClientContext::Create() {
+  return new DummyBlimpClientContext();
+}
+
+DummyBlimpClientContext::DummyBlimpClientContext() : BlimpClientContext() {}
+
+DummyBlimpClientContext::~DummyBlimpClientContext() {}
+
+#if defined(OS_ANDROID)
+
+base::android::ScopedJavaLocalRef<jobject>
+DummyBlimpClientContext::GetJavaObject() {
+  return GetDummyBlimpClientContextAndroid()->GetJavaObject();
+}
+
+DummyBlimpClientContextAndroid*
+DummyBlimpClientContext::GetDummyBlimpClientContextAndroid() {
+  DummyBlimpClientContextAndroid* dummy_blimp_client_contents_android =
+      static_cast<DummyBlimpClientContextAndroid*>(
+          GetUserData(kDummyBlimpClientContextAndroidKey));
+  if (!dummy_blimp_client_contents_android) {
+    dummy_blimp_client_contents_android = new DummyBlimpClientContextAndroid();
+    SetUserData(kDummyBlimpClientContextAndroidKey,
+                dummy_blimp_client_contents_android);
+  }
+  return dummy_blimp_client_contents_android;
+}
+
+#endif  // defined(OS_ANDROID)
+
+void DummyBlimpClientContext::SetDelegate(
+    BlimpClientContextDelegate* delegate) {}
+
+std::unique_ptr<BlimpContents> DummyBlimpClientContext::CreateBlimpContents() {
+  return nullptr;
+}
+
+}  // namespace client
+}  // namespace blimp