build/build-bisect.py says the regressing range is http://build.chromium.org/buildbot/perf/dashboard/ui/changelog.html?url=/trunk/src&range=51252:51258

http://codereview.chromium.org/2858035 sounds like the most likely culprit.

(http://codereview.chromium.org/2858007 disabled the test that checks if the default plugin works :-/)

cc'd plugin folks: fyi.

Regressions are p1. Assigning to bauerb for now, reassign to me if you can show that you CL is not the culprit :-)

http://codereview.chromium.org/2854041

The following revision refers to this bug:
    http://src.chromium.org/viewvc/chrome?view=rev&revision=51713 

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r51713 | bauerb@chromium.org | 2010-07-07 07:49:31 -0700 (Wed, 07 Jul 2010) | 8 lines
Changed paths:
   M http://src.chromium.org/viewvc/chrome/trunk/src/chrome/browser/default_plugin_uitest.cc?r1=51713&r2=51712
   M http://src.chromium.org/viewvc/chrome/trunk/src/webkit/glue/plugins/plugin_list.cc?r1=51713&r2=51712

Fix a bug effectively disabling the default plugin.

Also, re-enable DefaultPluginUITest.DefaultPluginLoadTest.

BUG=48388,46662
TEST=DefaultPluginUITest.DefaultPluginLoadTest

Review URL: http://codereview.chromium.org/2854041
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<b>What steps will reproduce the problem?</b>
1. Go to e.g. http://www.adobe.com/shockwave/welcome/ (without having shockwave installed)

<b>What is the expected output? What do you see instead?</b>

The default plugin should get loaded. It doesn't.

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