[7u-dev] Request for approval for 8100380, 8010309, 7163898, 8007703

[Mandy Chung]

This is to request backport of the following bug fixes in 7u-dev:

8011380: FX dependency on PlatformLogger broken by 8010309
8010309: Improve PlatformLogger.isLoggable performance by direct mapping 
from an integer to Level
7163898: add isLoggable() check to doLog()

Webrev at:
    
http://cr.openjdk.java.net/~mchung/jdk7u/webrevs/platformlogger-backport/

The above are direct import of the jdk8 changesets [1][2][3].

8007703: Remove com.sun.servicetag API

Webrev at:
    http://cr.openjdk.java.net/~mchung/jdk7u/webrevs/servicetag-backport/

This is the same patch as the jdk8 changeset [4][5] without the new 
build makefiles change.

Thanks
Mandy
[1] http://hg.openjdk.java.net/jdk8/jdk8/jdk/rev/9ed029a0326d
[2] http://hg.openjdk.java.net/jdk8/jdk8/jdk/rev/e433ed08b733
[3] http://hg.openjdk.java.net/jdk8/jdk8/jdk/rev/b62a76763bf3
[4] http://hg.openjdk.java.net/jdk8/jdk8/jdk/rev/5e383a73386a
[5] http://hg.openjdk.java.net/jdk8/jdk8/jdk/rev/335d2156222e