Add CompositorFrameSinkClientBinding To Be Used By FrameGenerator

services/ui/ws/compositor_frame_sink_client_binding.cc

Index: services/ui/ws/compositor_frame_sink_client_binding.cc
diff --git a/services/ui/ws/compositor_frame_sink_client_binding.cc b/services/ui/ws/compositor_frame_sink_client_binding.cc
new file mode 100644
index 0000000000000000000000000000000000000000..f17082907c054ac5e2f673760791e711469b6671
--- /dev/null
+++ b/services/ui/ws/compositor_frame_sink_client_binding.cc
@@ -0,0 +1,49 @@
+// 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 "services/ui/ws/compositor_frame_sink_client_binding.h"
+
+namespace ui {
+namespace ws {
+
+DefaultCompositorFrameSinkClientBinding::
+    DefaultCompositorFrameSinkClientBinding(
+        cc::mojom::MojoCompositorFrameSinkClient* sink_client,
+        cc::mojom::MojoCompositorFrameSinkClientRequest sink_client_request,
+        cc::mojom::MojoCompositorFrameSinkAssociatedPtr compositor_frame_sink,
+        cc::mojom::DisplayPrivateAssociatedPtr display_private)
+    : binding_(sink_client, std::move(sink_client_request)),
+      display_private_(std::move(display_private)),
+      compositor_frame_sink_(std::move(compositor_frame_sink)) {}
+
+DefaultCompositorFrameSinkClientBinding::
+    ~DefaultCompositorFrameSinkClientBinding() = default;
+
+void DefaultCompositorFrameSinkClientBinding::SubmitCompositorFrame(
+    cc::CompositorFrame frame) {
+  gfx::Size frame_size = last_submitted_frame_size_;
+  if (!frame.render_pass_list.empty())
+    frame_size = frame.render_pass_list.back()->output_rect.size();
+
+  if (!local_surface_id_.is_valid() ||
+      frame_size != last_submitted_frame_size_) {
+    local_surface_id_ = id_allocator_.GenerateId();
+    display_private_->ResizeDisplay(frame_size);
+    display_private_->SetLocalSurfaceId(local_surface_id_,
+                                        frame.metadata.device_scale_factor);
+  }
+
+  compositor_frame_sink_->SubmitCompositorFrame(local_surface_id_,
+                                                std::move(frame));
+  compositor_frame_sink_->SetNeedsBeginFrame(false);
+  last_submitted_frame_size_ = frame_size;
+}
+
+void DefaultCompositorFrameSinkClientBinding::SetNeedsBeginFrame(
+    bool needs_begin_frame) {
+  compositor_frame_sink_->SetNeedsBeginFrame(needs_begin_frame);
+}
+
+}  // namespace ws
+}  // namespace ui