Cleanup of v8 extension stuff. Playback extension is only used in chrome, so move it to chrome\rend…

chrome/common/chrome_switches.cc

Index: chrome/common/chrome_switches.cc
===================================================================
--- chrome/common/chrome_switches.cc	(revision 132793)
+++ chrome/common/chrome_switches.cc	(working copy)
@@ -854,6 +854,13 @@
 // you're for some reason tempted to pass them both.
 const char kNoFirstRun[]                    = "no-first-run";
 
+// Support a separate switch that enables the v8 playback extension.
+// The extension causes javascript calls to Date.now() and Math.random()
+// to return consistent values, such that subsequent loads of the same
+// page will result in consistent js-generated data and XHR requests.
+// Pages may still be able to generate inconsistent data from plugins.
+const char kNoJsRandomness[]                = "no-js-randomness";
+
 // Don't send hyperlink auditing pings
 const char kNoPings[]                       = "no-pings";
 
@@ -934,6 +941,10 @@
 // Specifies the path to the user data folder for the parent profile.
 const char kParentProfile[]                 = "parent-profile";
 
+// Read previously recorded data from the cache. Only cached data is read.
+// See kRecordMode.
+const char kPlaybackMode[]                  = "playback-mode";
+
 // Controls the PPAPI Flash field trial. Valid values are defined below. If an
 // unknown value is supplied on the command line, the switch is ignored.
 // TODO(yzshen): Remove this flag when the field trial is over.
@@ -1037,6 +1048,12 @@
 // NOTE: This is only implemented for Views.
 const char kPurgeMemoryButton[]             = "purge-memory-button";
 
+// Chrome supports a playback and record mode.  Record mode saves *everything*
+// to the cache.  Playback mode reads data exclusively from the cache.  This
+// allows us to record a session into the cache and then replay it at will.
+// See also kPlaybackMode.
+const char kRecordMode[]                    = "record-mode";
+
 // Reloads pages that have been killed when they are next focused by the user.
 const char kReloadKilledTabs[]              = "reload-killed-tabs";