Add BlimpClientContext and factory with real and dummy implementation

blimp/client/core/blimp_client_context_impl.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/blimp_client_context_impl.h"
+
+#include "base/memory/ptr_util.h"
+#include "base/supports_user_data.h"
+#include "blimp/client/core/blimp_contents_impl.h"
+#include "blimp/client/public/blimp_client_context_delegate.h"
+
+#if defined(OS_ANDROID)
+#include "blimp/client/core/android/blimp_client_context_impl_android.h"
+#endif  // OS_ANDROID
+
+namespace blimp {
+namespace client {
+
+namespace {
+
+#if defined(OS_ANDROID)
+const char kBlimpClientContextImplAndroidKey[] =
+    "blimp_client_context_impl_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/dummy_blimp_client_context.cc should be linked in to
+// any binary using BlimpClientContext::Create.
+// static
+BlimpClientContext* BlimpClientContext::Create() {
+  return new BlimpClientContextImpl();
+}
+
+BlimpClientContextImpl::BlimpClientContextImpl() : BlimpClientContext() {}
+
+BlimpClientContextImpl::~BlimpClientContextImpl() {}
+
+#if defined(OS_ANDROID)
+
+base::android::ScopedJavaLocalRef<jobject>
+BlimpClientContextImpl::GetJavaObject() {
+  return GetBlimpClientContextImplAndroid()->GetJavaObject();
+}
+
+BlimpClientContextImplAndroid*
+BlimpClientContextImpl::GetBlimpClientContextImplAndroid() {
+  BlimpClientContextImplAndroid* blimp_client_contents_impl_android =
+      static_cast<BlimpClientContextImplAndroid*>(
+          GetUserData(kBlimpClientContextImplAndroidKey));
+  if (!blimp_client_contents_impl_android) {
+    blimp_client_contents_impl_android =
+        new BlimpClientContextImplAndroid(this);
+    SetUserData(kBlimpClientContextImplAndroidKey,
+                blimp_client_contents_impl_android);
+  }
+  return blimp_client_contents_impl_android;
+}
+
+#endif  // defined(OS_ANDROID)
+
+void BlimpClientContextImpl::SetDelegate(BlimpClientContextDelegate* delegate) {
+  delegate_ = delegate;
+}
+
+std::unique_ptr<BlimpContents> BlimpClientContextImpl::CreateBlimpContents() {
+  std::unique_ptr<BlimpContents> blimp_contents =
+      base::WrapUnique(new BlimpContentsImpl);
+  delegate_->AttachBlimpContentsHelpers(blimp_contents.get());
+  return blimp_contents;
+}
+
+}  // namespace client
+}  // namespace blimp