Create A/B test of SDCH...

chrome/common/chrome_switches.cc

Index: chrome/common/chrome_switches.cc
===================================================================
--- chrome/common/chrome_switches.cc	(revision 19594)
+++ chrome/common/chrome_switches.cc	(working copy)
@@ -473,16 +473,16 @@
 // is cleaned up and playback testing completed.
 const wchar_t kSimpleDataSource[]              = L"simple-data-source";
 
-// Some field tests may be performed in the browser, and the randomly selected
-// outcome needs to be propogated to the renderer to appropriately modify the
-// histogram names that will be tested.  This command line argument is only
-// parsed by the renderer, and consists of a field test name, and a forced
-// selection of an outcome.  For example, if a field test "DnsImpact" has
-// selected "_disabled_prefetch" as a current test, then the render should be
-// passed the command line:
-//      force-fieldtest=DnsImpact/_disabled_prefetch
-// The renderer will then force said named field test to exist, and will force
-// the selected outcome to have the indicated text value.
+// Some field tests may rendomized in the browser, and the randomly selected
+// outcome needs to be propogated to the renderer.  For instance, this is used
+// to modify histograms recorded in the renderer, or to get the renderer to
+// also set of its state (initialize, or not initialize components) to match the
+// experiment(s).
+// The argument is a string-ized list of experiment names, and the associated
+// value that was randomly selected.  In the recent implementetaion, the
+// persistent representation generated by field_trial.cc and later decoded, is a
+// list of name and value pairs, separated by slashes. See field trial.cc for
+// current details.
 const wchar_t kForceFieldTestNameAndValue[]    = L"force-fieldtest";
 
 // Allows the new tab page resource to be loaded from a local HTML file. This