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

ui/ozone/platform/cast/ozone_platform_cast.cc

Index: ui/ozone/platform/cast/ozone_platform_cast.cc
diff --git a/ui/ozone/platform/cast/ozone_platform_cast.cc b/ui/ozone/platform/cast/ozone_platform_cast.cc
index 60f7c9a901220a23d2ed3f2662da1cdb6a714211..d740e5a0b04f2963fcf76b6b2f83543b05e1ff99 100644
--- a/ui/ozone/platform/cast/ozone_platform_cast.cc
+++ b/ui/ozone/platform/cast/ozone_platform_cast.cc
@@ -5,6 +5,7 @@
 #include "ui/ozone/platform/cast/ozone_platform_cast.h"
 
 #include "base/command_line.h"
+#include "base/file_descriptor_posix.h"
 #include "chromecast/public/cast_egl_platform.h"
 #include "chromecast/public/cast_egl_platform_shlib.h"
 #include "ui/ozone/common/native_display_delegate_ozone.h"
@@ -15,6 +16,7 @@
 #include "ui/ozone/public/cursor_factory_ozone.h"
 #include "ui/ozone/public/gpu_platform_support_host.h"
 #include "ui/ozone/public/input_controller.h"
+#include "ui/ozone/public/native_pixmap_manager.h"
 #include "ui/ozone/public/ozone_platform.h"
 #include "ui/ozone/public/system_input_injector.h"
 
@@ -68,6 +70,10 @@ class OzonePlatformCast : public OzonePlatform {
     return make_scoped_ptr(new NativeDisplayDelegateOzone());
   }
 
+  base::FileDescriptor GetVirtualDeviceFd() override {
+    return base::FileDescriptor();
+  }
+
   void InitializeUI() override {
     overlay_manager_.reset(new OverlayManagerCast());
     cursor_factory_.reset(new CursorFactoryOzone());
@@ -102,4 +108,8 @@ OzonePlatform* CreateOzonePlatformCast() {
   return new OzonePlatformCast(platform.Pass());
 }
 
+NativePixmapManager* CreateNativePixmapManagerCast() {
+  return CreateStubNativePixmapManager();
+}
+
 }  // namespace ui