mus: Use a barebone mus client-lib in chrome-renderer.

content/renderer/mus/renderer_window_tree_client.cc

+// Copyright 2017 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 "content/renderer/mus/renderer_window_tree_client.h"
+
+#include <map>
+
+#include "base/lazy_instance.h"
+#include "services/ui/public/cpp/window_compositor_frame_sink.h"
+
+namespace content {
+
+namespace {
+typedef std::map<int, RendererWindowTreeClient*> ConnectionMap;
+base::LazyInstance<ConnectionMap>::Leaky g_connections =
+    LAZY_INSTANCE_INITIALIZER;
+}  // namespace
+
+// static
+RendererWindowTreeClient* RendererWindowTreeClient::Get(int routing_id) {
+  auto it = g_connections.Get().find(routing_id);
+  if (it != g_connections.Get().end())
+    return it->second;
+  return nullptr;
+}
+
+// static
+void RendererWindowTreeClient::Create(int routing_id) {
+  DCHECK(g_connections.Get().find(routing_id) == g_connections.Get().end());
+  RendererWindowTreeClient* connection =
+      new RendererWindowTreeClient(routing_id);
+  g_connections.Get().insert(std::make_pair(routing_id, connection));
+}
+
+RendererWindowTreeClient::RendererWindowTreeClient(int routing_id)
+    : routing_id_(routing_id), binding_(this) {}
+
+RendererWindowTreeClient::~RendererWindowTreeClient() {
+  g_connections.Get().erase(routing_id_);
+}
+
+void RendererWindowTreeClient::Bind(
+    ui::mojom::WindowTreeClientRequest request) {
+  binding_.Bind(std::move(request));
+}
+
+std::unique_ptr<cc::CompositorFrameSink>
+RendererWindowTreeClient::CreateCompositorFrameSink(
+    const cc::FrameSinkId& frame_sink_id,
+    scoped_refptr<cc::ContextProvider> context_provider,
+    gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager) {
+  std::unique_ptr<ui::WindowCompositorFrameSinkBinding> frame_sink_binding;
+  auto frame_sink = ui::WindowCompositorFrameSink::Create(
+      frame_sink_id, std::move(context_provider), gpu_memory_buffer_manager,
+      &frame_sink_binding);
+  if (tree_) {
+    tree_->AttachCompositorFrameSink(
+        root_window_id_, frame_sink_binding->TakeFrameSinkRequest(),
+        mojo::MakeProxy(frame_sink_binding->TakeFrameSinkClient()));
+  } else {
+    pending_frame_sink_ = std::move(frame_sink_binding);
+  }
+  return std::move(frame_sink);
+}
+
+void RendererWindowTreeClient::DestroySelf() {
+  delete this;
+}
+
+void RendererWindowTreeClient::OnEmbed(ui::ClientSpecificId client_id,
+                                       ui::mojom::WindowDataPtr root,
+                                       ui::mojom::WindowTreePtr tree,
+                                       int64_t display_id,
+                                       ui::Id focused_window_id,
+                                       bool drawn) {
+  root_window_id_ = root->window_id;
+  tree_ = std::move(tree);
+  if (pending_frame_sink_) {
+    tree_->AttachCompositorFrameSink(
+        root_window_id_, pending_frame_sink_->TakeFrameSinkRequest(),
+        mojo::MakeProxy(pending_frame_sink_->TakeFrameSinkClient()));
+    pending_frame_sink_ = nullptr;
+  }
+}
+
+void RendererWindowTreeClient::OnEmbeddedAppDisconnected(ui::Id window_id) {
+  // TODO(sad): Embedded mus-client (oopif) is gone. Figure out what to do.
+}
+
+void RendererWindowTreeClient::OnUnembed(ui::Id window_id) {
+  CHECK_EQ(window_id, root_window_id_);
+  DestroySelf();
+}
+
+void RendererWindowTreeClient::OnTopLevelCreated(uint32_t change_id,
+                                                 ui::mojom::WindowDataPtr data,
+                                                 int64_t display_id,
+                                                 bool drawn) {
+  NOTREACHED();
+}
+
+void RendererWindowTreeClient::OnWindowDeleted(ui::Id window_id) {
+  // TODO(sad): With OOPIF, |window_id| may not be |root_window_id_|. We need to
+  // make sure that works correctly.
+  CHECK_EQ(window_id, root_window_id_);
+  DestroySelf();
+}
+
+void RendererWindowTreeClient::OnWindowInputEvent(
+    uint32_t event_id,
+    ui::Id window_id,
+    std::unique_ptr<ui::Event> event,
+    bool matches_pointer_watcher) {
+  NOTREACHED();
+}
+
+void RendererWindowTreeClient::OnPointerEventObserved(
+    std::unique_ptr<ui::Event> event,
+    uint32_t window_id) {
+  NOTREACHED();
+}
+
+void RendererWindowTreeClient::OnWindowSurfaceChanged(
+    ui::Id window_id,
+    const cc::SurfaceInfo& surface_info) {
+  NOTIMPLEMENTED();

[Fady Samuel, 2017/01/24 02:04:38]

We would get to here when an OOPIF submits a CompositorFrame on resize. The
parent should embed that SurfaceInfo. Basically this should make its way to
ChildFrameCompositingHelper. Speaking of which, ChildFrameCompositingHelper
should probably take in a SurfaceReferenceFactory at construction.

[sadrul, 2017/01/24 18:02:41]

Acknowledged.

+}
+
+void RendererWindowTreeClient::GetWindowManager(
+    mojo::AssociatedInterfaceRequest<ui::mojom::WindowManager> internal) {
+  NOTREACHED();
+}
+
+}  // namespace content