Pepper: Remove unnecessary CloseManifestEntry code.

There's some logic in ServiceRuntime to support a future implementation for
CloseManifestEntry, but since we don't take any useful action, it's much
simpler to always return true. This makes ServiceRuntime even smaller.

This also removes an unused struct in ServiceRuntime.

BUG=239656

Review URL: https://codereview.chromium.org/280613002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@269962 0039d316-1c4b-4281-b951-d872f2087c98
2 files changed