[loading metric] filter out events during cache warming

telemetry/telemetry/page/cache_temperature.py

Index: telemetry/telemetry/page/cache_temperature.py
diff --git a/telemetry/telemetry/page/cache_temperature.py b/telemetry/telemetry/page/cache_temperature.py
index f7d09b4f9ac52d0907ccc26845789ec31d33dc5d..bf04cc8844861edb0c894f6b78faf5c379fb869c 100644
--- a/telemetry/telemetry/page/cache_temperature.py
+++ b/telemetry/telemetry/page/cache_temperature.py
@@ -32,10 +32,10 @@ class MarkTelemetryInternal(object):
 
   def __enter__(self):
     self.browser.tabs[0].ExecuteJavaScript(
-        """console.time('telemetry.{0}.warmCache.start');""".format(
+        """console.time('telemetry.internal.{0}.start');""".format(
           self.identifier))
     self.browser.tabs[0].ExecuteJavaScript(
-        """console.timeEnd('telemetry.{0}.warmCache.start');""".format(
+        """console.timeEnd('telemetry.internal.{0}.start');""".format(
           self.identifier))
     return self
 
@@ -44,10 +44,10 @@ class MarkTelemetryInternal(object):
       return True
 
     self.browser.tabs[0].ExecuteJavaScript(
-        """console.time('telemetry.{0}.warmCache.end');""".format(
+        """console.time('telemetry.internal.{0}.end');""".format(
           self.identifier))
     self.browser.tabs[0].ExecuteJavaScript(
-        """console.timeEnd('telemetry.{0}.warmCache.end');""".format(
+        """console.timeEnd('telemetry.internal.{0}.end');""".format(
           self.identifier))
     return True