[7u] Request for approval: 7198229 [macosx] Painting during resizing of the frame should be more smooth

[Sergey Bylokhov]

Hi Everyone,
This is a direct back port from jdk 8 to jdk 7u.

Bug: http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7198229
Webrev can be found at: http://cr.openjdk.java.net/~serb/7198229/webrev.01
jdk8 changeset:http://hg.openjdk.java.net/jdk8/jdk8/jdk/rev/7ead109417f0

Reviewers: Denis Fokin, Anthony Petrov, Scott Kovatch.

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Best regards, Sergey.