Misc. cleanup for extension_view_views.*:

Misc. cleanup for extension_view_views.*:
* unix_hacker()-style accessors must be defined inline; inlined functions must
  be named unix_hacker()-style
* Class declarations and friend statements go atop the section
* Put overrides above non-virtuals (since public and private sections disagreed,
  I'm just picking one for consistency)
* Declare overrides in the same order as in the original base class header
* Inline two unnecessary temps, de-inline a repeated non-cheap call

The only functional change here is that GetMinimumSize() was moved from private
to public since I need to call that in some infobar code.

BUG=none
TEST=none
R=msw@chromium.org

Review URL: https://codereview.chromium.org/119683002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@242210 0039d316-1c4b-4281-b951-d872f2087c98