media: GpuMemoryBuffers memory tracing.
media: GpuMemoryBuffers memory tracing.

This patch adds memory tracing for GpuMemoryBuffers and graphics resources
used by media in GpuMemoryBufferVideoFramePool.

BUG=

Review URL: https://codereview.chromium.org/1355373003

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#351152}

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