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fix(language-service): Instantiate MetadataResolver once #32145

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kyliau wants to merge 1 commit into angular:master from kyliau:typescript_host

Commits on Aug 15, 2019

fix(language-service): Instantiate MetadataResolver once

Instead of destroying and recreating MetadataResolver every time the
program changes, create one instance and reuse it throughout the
lifetime of the language service.
Since Angular StaticSymbols are invalidated when program gets
out-of-date, this should be safe.
This should make the language service more more performant.

Keen Yee Liau committed Aug 15, 2019