Add DocumentMarkerList interface and GenericDocumentMarkerListImpl
Based on step 3 of yosin's plan:
https://codereview.chromium.org/2812423002#msg7
This CL does the following:
- Introduces a DocumentMarkerList interface
- Introduces GenericDocumentMarkerListImpl, an implementation
of DocumentMarkerList that works for all marker types and is implemented on top
of DocumentMarkerListEditor
- Refactors DocumentMarkerController to use GenericDocumentMarkerListImpl instead
of using DocumentMarkerListEditor directly
BUG=707867
Review-Url: https://codereview.chromium.org/2820633002
Cr-Commit-Position: refs/heads/master@{#467549}
9 files changed
