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

ui/ozone/platform/egltest/ozone_platform_egltest.h

Index: ui/ozone/platform/egltest/ozone_platform_egltest.h
diff --git a/ui/ozone/platform/egltest/ozone_platform_egltest.h b/ui/ozone/platform/egltest/ozone_platform_egltest.h
index fb49be50274e3b94ad2114f4bd608b9721baf902..26b52d365d730d7bc774b5504e9c130b6bbe19fc 100644
--- a/ui/ozone/platform/egltest/ozone_platform_egltest.h
+++ b/ui/ozone/platform/egltest/ozone_platform_egltest.h
@@ -7,11 +7,15 @@
 
 namespace ui {
 
+class OzoneClient;
 class OzonePlatform;
 
 // Constructor hook for use in ozone_platform_list.cc
 OzonePlatform* CreateOzonePlatformEgltest();
 
+// Constructor hook for use in constructor_client_list.cc
+OzoneClient* CreateOzoneClientEgltest();
+
 }  // namespace ui
 
 #endif  // UI_OZONE_PLATFORM_TEST_OZONE_PLATFORM_EGLTEST_H_