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 d3a1ea965c39017e121c70b89a3ab3b2f7ede9cf..41acc32f639cf52910828cf54226ab3df835550a 100644
--- a/ui/ozone/platform/cast/ozone_platform_cast.cc
+++ b/ui/ozone/platform/cast/ozone_platform_cast.cc
@@ -14,7 +14,9 @@
 #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/ozone_client.h"
 #include "ui/ozone/public/ozone_platform.h"
+#include "ui/ozone/public/surface_client_factory_ozone.h"
 #include "ui/ozone/public/system_input_injector.h"
 
 using chromecast::CastEglPlatform;
@@ -91,6 +93,32 @@ class OzonePlatformCast : public OzonePlatform {
   DISALLOW_COPY_AND_ASSIGN(OzonePlatformCast);
 };
 
+class OzoneClientCast : public OzoneClient {
+ public:
+  OzoneClientCast() {}
+  ~OzoneClientCast() override {}
+
+  // OzoneClient:
+  SurfaceClientFactoryOzone* GetSurfaceClientFactoryOzone() override {
+    return surface_client_.get();
+  }
+
+  void InitializeUI() override {
+    if (!surface_client_)
+      surface_client_.reset(new SurfaceClientFactoryOzone);
+  }
+
+  void InitializeRenderer() override {
+    if (!surface_client_)
+      surface_client_.reset(new SurfaceClientFactoryOzone);
+  }
+
+ private:
+  scoped_ptr<SurfaceClientFactoryOzone> surface_client_;
+
+  DISALLOW_COPY_AND_ASSIGN(OzoneClientCast);
+};
+
 }  // namespace
 
 OzonePlatform* CreateOzonePlatformCast() {
@@ -101,4 +129,8 @@ OzonePlatform* CreateOzonePlatformCast() {
   return new OzonePlatformCast(platform.Pass());
 }
 
+OzoneClient* CreateOzoneClientCast() {
+  return new OzoneClientCast;
+}
+
 }  // namespace ui