Trim small shadow bubble image assets.

Trim the assets to more tightly fit their visual contents.
(they had excessively large transparent internal padding)

Trim 8px/16px off of 100%/200% bubble border images.
Trim 2px/4px off of 100%/200% bubble arrow images.
(the bottom 1px of the 200% border had 1/255 alpha...)

Keeps dimension consistency needed by Views::BubbleBorder.
(more code flexibility would allow non-uniform trimming)

Edit Bookmark dialog pics: http://crbug.com/313400
(note the area trimmed from the edges of the window)

Update the bookmark bubble anchor insets to match.
(needed for anchoring with PAINT_NONE arrow and insets)
(no other bubbles should need this type of update, afaict)

Simplify BubbleDelegateTest.NonClientHitTest test cases.
(was too fragile, broken by minor image size changes)

BUG=313400
TEST=Non-Ash bubble-bordered windows have reduced bounds. No visual regressions in bubbles, new style dialogs, menus, etc.
R=sky@chromium.org,oshima@chromium.org

Review URL: https://codereview.chromium.org/53943002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@232367 0039d316-1c4b-4281-b951-d872f2087c98
WebUI: Apply focus hack only if a list item gets selected.

This fixes two regressions by r227470 [1].

crbug.com/312611:
We didn't remove focus from inner elements by mousedown because the
list item contained the focused element. We don't need such behavior if the
list item is already selected.

crbug.com/313125:
MenuButton::hideMenu() sets focus on the menu button element. So
List::handleMouseDown thought a list item had a special focus handling,
and canceled the default behavior. This issue is also resolved by not
applying the hack for already-selected list item.

crbug.com/313611:
The focus hack should work only for left button.

[1] http://src.chromium.org/viewvc/chrome?view=rev&revision=227470

BUG=312611,313125,313611

Review URL: https://codereview.chromium.org/54053003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@232368 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 232367
SVN changes up to revision 232368