Revert of 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 11dbc45c4e7bb20da6416a9fa1344cd919f284af..5dbc20784c85eddb1274fbc97cbbb3de22010b86 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder.cc
@@ -3845,6 +3845,10 @@
       !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;
 }