[Ozone] Testing

Author: sherryzy

cobalt/build/configs/linux-x64x11/args.gn

@@ -2,12 +2,19 @@ import("//cobalt/build/configs/chromium_linux-x64x11/args.gn")
 import("//cobalt/build/configs/common.gn")
 
 use_ozone = true
+ozone_auto_platforms = false
+ozone_platform = "starboard"
+angle_enable_gl = true
 
 # Vulkan is a new rendering (and presentation, and more) API intended to replace
 # E/GL(ES). Partners are only required to support upto GLES 2.0 : https://developers.google.com/youtube/cobalt/docs/reference/starboard/modules/16/gles#gles_version
 # Disable Vulkan until we formally decide to support it.
 enable_vulkan = false
 
+# Angle supports multiple backends. If Vulkan is engaged (for tests, SwAngle),
+# then we don't want to have a real display.
+angle_use_vulkan_null_display = true
+
 # Overriding flag from //media/media_options.gni.
 # Cobalt doesn't use //third_party/ffmpeg.
 media_use_ffmpeg = false

ui/gl/init/gl_display_initializer.cc

@@ -111,6 +111,7 @@ void GetEGLInitDisplays(bool supports_angle_d3d,
 #else
       AddInitDisplay(init_displays, ANGLE_OPENGL);
       AddInitDisplay(init_displays, ANGLE_OPENGLES);
+      AddInitDisplay(init_displays, ANGLE_OPENGLES_EGL);
 #endif  // BUILDFLAG(IS_ANDROID)
     } else {
       if (requested_renderer == kANGLEImplementationOpenGLName) {

ui/ozone/platform/starboard/ozone_platform_starboard.cc

@@ -173,8 +173,6 @@ OzonePlatform* CreateOzonePlatformStarboard() {
     CHECK_EQ(cmd->GetSwitchValueASCII(switches::kUseGL),
              gl::kGLImplementationANGLEName)
         << " Unsupported " << switches::kUseGL << " implementation";
-  } else {
-    cmd->AppendSwitchASCII(switches::kUseGL, gl::kGLImplementationANGLEName);
   }
 
   return new OzonePlatformStarboard();