[telemetry] Disable measuring renderer CPU usage.

tools/telemetry/telemetry/core/browser.py

Index: tools/telemetry/telemetry/core/browser.py
diff --git a/tools/telemetry/telemetry/core/browser.py b/tools/telemetry/telemetry/core/browser.py
index 600e26c96156389443e1ec3964eb1092f6fa6c78..dee8f5b4be4c75511129fc2982b2520e822a2bf2 100644
--- a/tools/telemetry/telemetry/core/browser.py
+++ b/tools/telemetry/telemetry/core/browser.py
@@ -215,6 +215,11 @@ class Browser(object):
     result = self._GetStatsCommon(self._platform_backend.GetCpuStats)
     del result['ProcessCount']
 
+    # FIXME: Renderer process CPU times are impossible to compare correctly.
+    # http://crbug.com/419786#c11
+    if 'Renderer' in result:
+      del result['Renderer']
+
     # We want a single time value, not the sum for all processes.
     cpu_timestamp = self._platform_backend.GetCpuTimestamp()
     for process_type in result: