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 49f4fc74411d1b356bb200102ce74d7f6bac8861..d8a7c8d9b4d2e2481887cb60911961021b11c129 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder.cc
@@ -3833,10 +3833,6 @@ 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;
 }