Reviewed by Darin Adler, Tim Hatcher.

        Fixed a few NSAutoreleasePool issues I noticed while reviewing Brady's patch.

        * platform/graphics/mac/GraphicsContextMac.mm:
        (WebCore::GraphicsContext::setCompositeOperation): Call -drain instead of 
        -release, since -release is a no-op in a GC world.

WebKit:

        Reviewed by Darin Adler, Tim Hatcher.

        Fixed a few NSAutoreleasePool issues I noticed while reviewing Brady's patch.

        * Carbon/CarbonUtils.m:
        (PoolCleaner): Call -drain instead of -release, since -release is a 
        no-op in a GC world.

        * Misc/WebKitErrors.m:
        (registerErrors): Condensed onto one line.

        * Plugins/WebPluginDatabase.m:
        (-[WebPluginDatabase refresh]): Call -drain instead of -release, since
        -release is a no-op in a GC world.

        * WebCoreSupport/WebChromeClient.mm:
        (WebChromeClient::setStatusbarText):

        * WebInspector/WebNodeHighlightView.m:
        (-[WebNodeHighlightView initWithHighlight:andRects:forView:]): Don't drain
        and then release because drain deallocates the receiver, so the release
        is an over-release.

        * WebView/WebView.mm:
        (-[WebView rectsForTextMatches]): Re-allocate the pool after draining it,
        because drain deallocates the receiver, so the drain would leave you without
        any autorelease pool, causing a leak and then an over-release at the bottom
        of the loop.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@21091 268f45cc-cd09-0410-ab3c-d52691b4dbfc