Make FrameDestructionObserver::m_frame a private.

Restrict visibility over FrameDestructionObserver, notably turning m_frame
into a private. This makes it slightly easier to replace
FrameDestructionObserver with something LifecycleObserver-derived instead.

Also includes some incidental core/plugins/ code tidyups.

R=haraken

Review URL: https://codereview.chromium.org/928033002

git-svn-id: svn://svn.chromium.org/blink/trunk@190230 bbb929c8-8fbe-4397-9dbb-9b2b20218538
9 files changed
tree: a2aa7beca191cff827e910dc48b6560d61ccbe21
  1. third_party/