memory-infra: Move dump level check to observer and rename session state

- Rename session_state to heap_profiler_serialization_state in MemoryDumpManager.
- Move IsDumpModeAllowed check from MemoryDumpManager to MemoryTracingObserver.

This further decouples MemoryDumpManager from tracing.

BUG=703184

Review-Url: https://codereview.chromium.org/2861133002
Cr-Original-Commit-Position: refs/heads/master@{#469721}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: b154afcbc07fcd0b31b1c59ef3c6c30c02bed13a
1 file changed
tree: 0baa1342eaa78007b0121a029dcec124cc7785a7
  1. tools/