ozone: Introduce ClientPixmap and ClientPixmapFactory for non-GPU processes.

ui/ozone/BUILD.gn

Index: ui/ozone/BUILD.gn
diff --git a/ui/ozone/BUILD.gn b/ui/ozone/BUILD.gn
index 5ceb65b037ed53f62e9c7aabb82256c7246873eb..0d6b889e4c1a3d2b4c4dac896694388787bef428 100644
--- a/ui/ozone/BUILD.gn
+++ b/ui/ozone/BUILD.gn
@@ -47,6 +47,7 @@ platform_list_cc_file = "$target_gen_dir/platform_list.cc"
 platform_list_h_file = "$target_gen_dir/platform_list.h"
 platform_list_txt_file = "$target_gen_dir/platform_list.txt"
 constructor_list_cc_file = "$target_gen_dir/constructor_list.cc"
+constructor_client_list_cc_file = "$target_gen_dir/constructor_client_list.cc"
 
 # GYP version: ui/ozone/ozone.gyp:ozone_base
 component("ozone_base") {
@@ -59,6 +60,8 @@ component("ozone_base") {
     "public/gpu_platform_support_host.h",
     "public/overlay_candidates_ozone.cc",
     "public/overlay_candidates_ozone.h",
+    "public/surface_client_factory_ozone.cc",
+    "public/surface_client_factory_ozone.h",
     "public/surface_factory_ozone.cc",
     "public/surface_factory_ozone.h",
     "public/surface_ozone_canvas.h",
@@ -97,12 +100,15 @@ component("ozone") {
     "platform_selection.h",
     "public/input_controller.cc",
     "public/input_controller.h",
+    "public/ozone_client.cc",
+    "public/ozone_client.h",
     "public/ozone_gpu_test_helper.cc",
     "public/ozone_gpu_test_helper.h",
     "public/ozone_platform.cc",
     "public/ozone_platform.h",
     "public/ozone_switches.cc",
     "public/ozone_switches.h",
+    constructor_client_list_cc_file,
     constructor_list_cc_file,
     platform_list_cc_file,
     platform_list_h_file,
@@ -113,6 +119,7 @@ component("ozone") {
   deps =
       [
         ":generate_constructor_list",
+        ":generate_constructor_client_list",
         ":generate_ozone_platform_list",
         ":ozone_base",
         "//base",
@@ -173,6 +180,30 @@ action("generate_constructor_list") {
   ]
 }
 
+action("generate_constructor_client_list") {
+  script = "generate_constructor_list.py"
+
+  inputs = [
+    platform_list_txt_file,
+  ]
+  outputs = [
+    constructor_client_list_cc_file,
+  ]
+
+  args = [
+    "--platform_list=" + rebase_path(platform_list_txt_file, root_build_dir),
+    "--output_cc=" +
+        rebase_path(constructor_client_list_cc_file, root_build_dir),
+    "--namespace=ui",
+    "--typename=OzoneClient",
+    "--include=\"ui/ozone/public/ozone_client.h\"",
+  ]
+
+  deps = [
+    ":generate_ozone_platform_list",
+  ]
+}
+
 test("ozone_unittests") {
   sources = [
     "run_all_unittests.cc",