GitLab

Add per-dialog UseNewStyleForThisDialog() style control.
(by default this returns the static UseNewStyle() control)
Update DialogDelegate to respect this per-dialog control.

Have TaskManagerView always use the old style; cleanup.
See before/after pics at http://crbug.com/245000#c1

Do DialogClientView background init in ViewHierarchyChanged.
(check the dialog delegate instance for styling control)

BUG=245000,166075
TEST=The task manager always uses the old dialog style.
R=sky@chromium.org

Review URL: https://chromiumcodereview.appspot.com/15731007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@203044 0039d316-1c4b-4281-b951-d872f2087c98