Enable Activity Logging by default

chrome/browser/extensions/api/web_request/web_request_api.cc

Index: chrome/browser/extensions/api/web_request/web_request_api.cc
diff --git a/chrome/browser/extensions/api/web_request/web_request_api.cc b/chrome/browser/extensions/api/web_request/web_request_api.cc
index efb09247dbd17e25ecf661bba95e905506ab01d5..23c2a59bc12a2c9297ebda119d62f1c8b88bd67a 100644
--- a/chrome/browser/extensions/api/web_request/web_request_api.cc
+++ b/chrome/browser/extensions/api/web_request/web_request_api.cc
@@ -1676,14 +1676,12 @@ void ExtensionWebRequestEventRouter::DecrementBlockCount(
     helpers::EventResponseDelta* delta =
         CalculateDelta(&blocked_request, response);
 
-    if (extensions::ActivityLog::IsLogEnabledOnAnyProfile()) {
-      LogExtensionActivity(profile,
-                           blocked_request.is_incognito,
-                           extension_id,
-                           blocked_request.request->url(),
-                           event_name,
-                           SummarizeResponseDelta(event_name, *delta));
-    }
+    LogExtensionActivity(profile,

[Matt Perry, 2013/08/30 20:49:20]

Actually, I just realized that LogAction is not the interesting call to measure.
I'd be interested to measure calls like this (and all the other ones that used
to be gated on ActivityLog::IsEnabled()), because that's where the extra
processing is done to create the args details object. Would you mind doing the
test again measuring those? For the webRequest one, make sure Adblock is
installed.

+                         blocked_request.is_incognito,
+                         extension_id,
+                         blocked_request.request->url(),
+                         event_name,
+                         SummarizeResponseDelta(event_name, *delta));
 
     blocked_request.response_deltas.push_back(
         linked_ptr<helpers::EventResponseDelta>(delta));