Devtools: Rename InspectorOverlayImpl to InspectorOverlay

BUG=

Review URL: https://codereview.chromium.org/1355563003

git-svn-id: svn://svn.chromium.org/blink/trunk@202650 bbb929c8-8fbe-4397-9dbb-9b2b20218538
7 files changed
tree: 207e403ea2f1facd8fcd1e439afc2d5624a68d6c
  1. third_party/