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

tools/telemetry/docs/telemetry.page.record_wpr.html

Index: tools/telemetry/docs/telemetry.page.record_wpr.html
diff --git a/tools/telemetry/docs/telemetry.page.record_wpr.html b/tools/telemetry/docs/telemetry.page.record_wpr.html
index 951514151e27bf6ce1a437e81fecc788182acb1d..fa49426c70274322417f01985502f4bc3532b62c 100644
--- a/tools/telemetry/docs/telemetry.page.record_wpr.html
+++ b/tools/telemetry/docs/telemetry.page.record_wpr.html
@@ -115,6 +115,10 @@ Data descriptors inherited from <a href="telemetry.page.page_test.html#PageTest"
 </dl>
 <dl><dt><strong>action_name_to_run</strong></dt>
 </dl>
+<dl><dt><strong>clear_cache_before_each_run</strong></dt>
+<dd><tt>When&nbsp;set&nbsp;to&nbsp;True,&nbsp;the&nbsp;browser's&nbsp;disk&nbsp;and&nbsp;memory&nbsp;cache&nbsp;will&nbsp;be&nbsp;cleared<br>
+before&nbsp;each&nbsp;run.</tt></dd>
+</dl>
 <dl><dt><strong>discard_first_result</strong></dt>
 <dd><tt>When&nbsp;set&nbsp;to&nbsp;True,&nbsp;the&nbsp;first&nbsp;run&nbsp;of&nbsp;the&nbsp;test&nbsp;is&nbsp;discarded.&nbsp;&nbsp;This&nbsp;is<br>
 useful&nbsp;for&nbsp;cases&nbsp;where&nbsp;it's&nbsp;desirable&nbsp;to&nbsp;have&nbsp;some&nbsp;test&nbsp;resource&nbsp;cached&nbsp;so<br>