components: default the user-defined empty ctor and dtor where possible

I need an owner's approval please for changes under:
components/nacl

This is a mechanical change. There are a few instances (but not all)
of empty user-defined constructors and destructors which can be
defaulted in the /components code.

This CL was uploaded by git cl split.

[email protected]

Bug: 371316188
Change-Id: Ic4bd192e305b3bc62d2fff2f97be4da571b2334e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5918054
Commit-Queue: Derek Schuff <[email protected]>
Reviewed-by: Derek Schuff <[email protected]>
Auto-Submit: Sorin Jianu <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1366450}
diff --git a/components/nacl/renderer/nacl_helper.cc b/components/nacl/renderer/nacl_helper.cc
index 489a9611..d9f734f6 100644
--- a/components/nacl/renderer/nacl_helper.cc
+++ b/components/nacl/renderer/nacl_helper.cc
@@ -11,7 +11,7 @@
 NaClHelper::NaClHelper(content::RenderFrame* render_frame)
     : RenderFrameObserver(render_frame) {}
 
-NaClHelper::~NaClHelper() {}
+NaClHelper::~NaClHelper() = default;
 
 void NaClHelper::DidCreatePepperPlugin(content::RendererPpapiHost* host) {
   // The Native Client plugin is a host for external plugins.