gpu: Use ANDROID_native_fence_sync instead of ARM_implicit_external_sync.

gpu/command_buffer/service/gles2_cmd_decoder.cc

Index: gpu/command_buffer/service/gles2_cmd_decoder.cc
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder.cc b/gpu/command_buffer/service/gles2_cmd_decoder.cc
index cd880c994926b25e55b77380d6e3a0ec3be8b44a..9446057510f34732acc80fbe9c1ba1d18a92d04a 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder.cc
@@ -3861,10 +3861,6 @@ Capabilities GLES2DecoderImpl::GetCapabilities() {
       !workarounds().disable_software_to_accelerated_canvas_upgrade;
   caps.emulate_rgb_buffer_with_rgba =
       workarounds().disable_gl_rgb_format;
-  if (workarounds().disable_non_empty_post_sub_buffers_for_onscreen_surfaces &&
-      !surface_->IsOffscreen()) {
-    caps.disable_non_empty_post_sub_buffers = true;
-  }
 
   return caps;
 }