Write mojom and StructTraits for DisplaySnapshot.

ui/display/display_snapshot_mojo.cc

Index: ui/display/display_snapshot_mojo.cc
diff --git a/ui/display/display_snapshot_mojo.cc b/ui/display/display_snapshot_mojo.cc
new file mode 100644
index 0000000000000000000000000000000000000000..53b1779a90351f6691fc1c21654f0a611fe152d4
--- /dev/null
+++ b/ui/display/display_snapshot_mojo.cc
@@ -0,0 +1,64 @@
+// 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 "ui/display/display_snapshot_mojo.h"
+
+#include "base/memory/ptr_util.h"
+#include "ui/display/types/display_constants.h"
+
+namespace display {
+
+DisplaySnapshotMojo::DisplaySnapshotMojo(int64_t display_id,
+                                         const gfx::Point& origin,
+                                         const gfx::Size& physical_size,
+                                         DisplayConnectionType type,
+                                         bool is_aspect_preserving_scaling,
+                                         bool has_overscan,
+                                         bool has_color_correction_matrix,
+                                         std::string display_name,
+                                         const base::FilePath& sys_path,
+                                         int64_t product_id,
+                                         DisplayModeList modes,
+                                         const std::vector<uint8_t>& edid,
+                                         const DisplayMode* current_mode,
+                                         const DisplayMode* native_mode,
+                                         const gfx::Size& maximum_cursor_size)
+    : DisplaySnapshot(display_id,
+                      origin,
+                      physical_size,
+                      type,
+                      is_aspect_preserving_scaling,
+                      has_overscan,
+                      has_color_correction_matrix,
+                      display_name,
+                      sys_path,
+                      std::move(modes),
+                      edid,
+                      current_mode,
+                      native_mode) {
+  product_id_ = product_id;
+  maximum_cursor_size_ = maximum_cursor_size;
+}
+
+DisplaySnapshotMojo::~DisplaySnapshotMojo() = default;
+
+std::unique_ptr<DisplaySnapshotMojo> DisplaySnapshotMojo::Clone() const {
+  DisplayModeList clone_modes;
+  for (auto& mode : modes())
+    clone_modes.push_back(mode->Clone());
+
+  return base::MakeUnique<DisplaySnapshotMojo>(
+      display_id(), origin(), physical_size(), type(),
+      is_aspect_preserving_scaling(), has_overscan(),
+      has_color_correction_matrix(), display_name(), sys_path(), product_id(),
+      std::move(clone_modes), edid(), current_mode(), native_mode(),
+      maximum_cursor_size());
+}
+
+// TODO(thanhph): Implement ToString() for debugging purposes.
+std::string DisplaySnapshotMojo::ToString() const {

[rjkroege, 2017/02/17 03:03:51]

My recollection is that this method is used for more than debugging purposes.
Please confirm this and implement as necessary in a subsequent CL.

[thanhph1, 2017/02/21 16:52:17]

I checked a few references to ToString() on code search and all of them are used
in debugging purposes. I can implement this method as necessary for subsequent
CLs.

+  return "";
+}
+
+}  // namespace display