Add chrome://slow for enabling performance tracing for feedback reports.

chrome/app/chromeos_strings.grdp

Index: chrome/app/chromeos_strings.grdp
diff --git a/chrome/app/chromeos_strings.grdp b/chrome/app/chromeos_strings.grdp
index c96d899aaafb5261f69c785c2303a86567d2f366..3fc23f48303ac221499688878023eac5d744a1a2 100644
--- a/chrome/app/chromeos_strings.grdp
+++ b/chrome/app/chromeos_strings.grdp
@@ -1618,6 +1618,19 @@ Press any key to continue exploring.
     This SIM card is disabled and cannot be used. Please contact your service provider for a replacement.
   </message>
 
+  <message name="IDS_SLOW_DISABLE" desc="The text of the button that disables performance collection for feedback reports">
+    Disable performance data collection
+  </message>
+  <message name="IDS_SLOW_ENABLE" desc="The text of the button that enables performance collection for feedback reports">
+    Enable performance data collection
+  </message>
+  <message name="IDS_SLOW_DESCRIPTION" desc="The description of the performance tracing feature for feedback reports.">
+    Enabling collection of performance data will help Google improve the system over time. No data is sent until you file a feedback report (Alt-Shift-I) and include performance data. You can return to this screen to disable collection at any time.
+  </message>
+  <message name="IDS_SLOW_WARNING" desc="The warning that informs users that enabling this can have a negative effect on their performance">
+    <ph name="BEGIN_BOLD">&lt;strong&gt;</ph>Note:<ph name="END_BOLD">&lt;/strong&gt;</ph> Only enable if you know what you are doing or if you have been asked to do so, as collection of data may reduce performance.
+  </message>
+
   <message name="IDS_EULA_BACK_BUTTON" desc="Back button shown on EULA screen.">
     Back
   </message>