Previously, ContextManager had two API's: one used by analysis server
to tell the ContextManager what to do, and one used by the
ContextManager to make callbacks to analysis server in response to its
requests. The first API was implemented in the class
AbstractContextManager, which derived from ContextManager, and the
second API was implemented in ServerContextManager, which derived from
AbstractContextManager.
In addition to causing confusion, this made it impossible to provide
an alternate implementation of ContextManager as a plug-in, since the
plug in would have had to re-implement the second API, and that would
have required accessing private implementation details of the
ContextManager.
This CL separates the API's: the first API is specified in
ContextManager and implemented in ContextManagerImpl, and the second
API is specified in ContextManagerCallbacks and implemented in
ServerContextManagerCallbacks.
In the long run I hope to eliminate the ContextManagerCallbacks class
entirely, by having the ContextManager tell its client what to do
using return values rather than callbacks.
R=brianwilkerson@google.com
Review URL: https://codereview.chromium.org//1243893002 .
Paul Berry
128dec84b5