[Telemetry] Add a page set option to use all cold page loads.

tools/telemetry/telemetry/core/browser_options.py

Index: tools/telemetry/telemetry/core/browser_options.py
diff --git a/tools/telemetry/telemetry/core/browser_options.py b/tools/telemetry/telemetry/core/browser_options.py
index 9d7493d067e319a48a0637f3feb38ce853080bff..0d91270c1c192f12117d79ad9fc9df77f5286147 100644
--- a/tools/telemetry/telemetry/core/browser_options.py
+++ b/tools/telemetry/telemetry/core/browser_options.py
@@ -33,6 +33,7 @@ class BrowserOptions(optparse.Values):
     self.extra_wpr_args = []
     self.show_stdout = False
     self.extensions_to_load = []
+    self.cold_page_loads = False

[nduca, 2013/06/06 22:49:04]

this doesn't sound like a browser option to me... it sounds like a page test
preference  a la page_test.requiresBrowserRestartAfterEachRun

[tonyg, 2013/06/20 02:42:29]

To me it seems to fit in with the page set options here. Like pageset-repeat
page-filter page-repeat, etc. We also can only customize BrowserOptions from the
Measurement and we only have access to the BrowserOptions in the place in the
PageRunner where we clear the cache. Is this okay to leave here or do you feel
strongly about moving it out?

 
     self.cros_remote = None
     self.wpr_mode = wpr_modes.WPR_OFF