Revert "media/chromeos: Add FrameResourceConverter base class"

This reverts commit a7e873b1afcb1f07aad3c559f72f67242bc4d036.

Reason for revert:
It seems that this CL is related to https://logs.chromium.org/logs/chromium/buildbucket/cr-buildbucket/8744832897320319825/+/u/compile/raw_io.output_text_failure_summary_ causing tree closure.

Original change's description:
> media/chromeos: Add FrameResourceConverter base class
>
> This adds a base class, FrameResourceConverter, that
> MailboxVideoFrameConverter inherits from. In the following CL,
> VideoDecoderPipeline will be migrated to FrameResourceConverter.
>
> As much shareable code was moved to the new base class. A derived class
> needs, minimally, to implement ConvertFrameImpl() and a factory
> function.
>
> FrameResourceConverter will be used as a base class for a new derived
> class later in this patch series.
>
> Bug: b:332382416
> Change-Id: I6d02a4a88e3dcec4bfe0543b22646611886a99bb
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5631411
> Reviewed-by: Andres Calderon Jaramillo <andrescj@chromium.org>
> Commit-Queue: Nathan Hebert <nhebert@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1316210}

Bug: b:332382416
Change-Id: I815982278884e8c9130c35b54db11f8c6df00394
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5633139
Commit-Queue: Huanpo Lin <robertlin@chromium.org>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Owners-Override: Robert Lin <robertlin@google.com>
Cr-Commit-Position: refs/heads/main@{#1316214}

• media/gpu/chromeos/BUILD.gn[diff]
• media/gpu/chromeos/frame_resource_converter.cc[Deleted - diff]
• media/gpu/chromeos/frame_resource_converter.h[Deleted - diff]
• media/gpu/chromeos/mailbox_video_frame_converter.cc[diff]
• media/gpu/chromeos/mailbox_video_frame_converter.h[diff]