Update test plugins to be fat.

chrome/test/data/extensions/uitest/plugins/README

Index: chrome/test/data/extensions/uitest/plugins/README
diff --git a/chrome/test/data/extensions/uitest/plugins/README b/chrome/test/data/extensions/uitest/plugins/README
index 2cd24efd16151e8ddb46242aede35af3a72b09db..80dbeb6ecf9c7b40bbfc0002cf565b398efb9834 100644
--- a/chrome/test/data/extensions/uitest/plugins/README
+++ b/chrome/test/data/extensions/uitest/plugins/README
@@ -6,4 +6,13 @@ npapi_layout_test_plugin with the mime type changed. The build machine is
 running 64-bit Hardy with GCC 4.2.4. The binaries have been stripped with
 strip --strip-unneeded.
 
-On Mac, plugin.plugin is a Release build of TestNetscapePlugin.plugin with the MIME type changed.
+On Mac, plugin.plugin is a Release build of TestNetscapePlugin.plugin with the
+MIME type changed. This was built from the tree as of r192827, with manual
+merging of the binaries:
+
+(From both 32 and 64 bit checkouts:)
+$ ninja -C out/Release TestNetscapePlugIn
+(then)
+$ lipo -create [...32...]/src/out/Release/TestNetscapePlugIn.plugin/Contents/MacOS/TestNetscapePlugIn \
+    [...64...]src/out/Release/TestNetscapePlugIn.plugin/Contents/MacOS/TestNetscapePlugIn \
+    -output [somewhere]/TestNetscapePlugIn