Remove some jank tracking instrumentation which is now accounted for.

chrome/browser/net/proxy_service_factory.cc

Index: chrome/browser/net/proxy_service_factory.cc
diff --git a/chrome/browser/net/proxy_service_factory.cc b/chrome/browser/net/proxy_service_factory.cc
index a8a79b5d063775d5eec782f5615a4dbd1c3d94ea..ceaef642cf8db623a2b4b257b8423728dc54152b 100644
--- a/chrome/browser/net/proxy_service_factory.cc
+++ b/chrome/browser/net/proxy_service_factory.cc
@@ -5,7 +5,6 @@
 #include "chrome/browser/net/proxy_service_factory.h"
 
 #include "base/command_line.h"
-#include "base/profiler/scoped_tracker.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/threading/thread.h"
 #include "chrome/browser/browser_process.h"
@@ -94,12 +93,6 @@ net::ProxyService* ProxyServiceFactory::CreateProxyService(
     const base::CommandLine& command_line,
     bool quick_check_enabled) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
-
-  // TODO(michaeln): Remove ScopedTracker below once crbug.com/454983 is fixed.
-  tracked_objects::ScopedTracker tracking_profile(
-      FROM_HERE_WITH_EXPLICIT_FUNCTION(
-          "454983 ProxyServiceFactory::CreateProxyService"));
-
 #if defined(OS_IOS)
   bool use_v8 = false;
 #else
@@ -122,18 +115,8 @@ net::ProxyService* ProxyServiceFactory::CreateProxyService(
     }
   }
 
-  // TODO(eroman): Remove once crbug.com/454983 is fixed.
-  tracked_objects::ScopedTracker tracking_profile2(
-      FROM_HERE_WITH_EXPLICIT_FUNCTION(
-          "454983 ProxyServiceFactory::CreateProxyService_2"));
-
   net::ProxyService* proxy_service = NULL;
   if (use_v8) {
-    // TODO(eroman): Remove once crbug.com/454983 is fixed.
-    tracked_objects::ScopedTracker tracking_profile3(
-        FROM_HERE_WITH_EXPLICIT_FUNCTION(
-            "454983 ProxyServiceFactory::CreateProxyService_3"));
-
 #if defined(OS_IOS)
     NOTREACHED();
 #else
@@ -146,11 +129,6 @@ net::ProxyService* ProxyServiceFactory::CreateProxyService(
     dhcp_proxy_script_fetcher = dhcp_factory.Create(context);
 #endif
 
-    // TODO(eroman): Remove once crbug.com/454983 is fixed.
-    tracked_objects::ScopedTracker tracking_profile4(
-        FROM_HERE_WITH_EXPLICIT_FUNCTION(
-            "454983 ProxyServiceFactory::CreateProxyService_4"));
-
     proxy_service = net::CreateProxyServiceUsingV8ProxyResolver(
         proxy_config_service,
         new net::ProxyScriptFetcherImpl(context),
@@ -160,11 +138,6 @@ net::ProxyService* ProxyServiceFactory::CreateProxyService(
         network_delegate);
 #endif  // defined(OS_IOS)
   } else {
-    // TODO(eroman): Remove once crbug.com/454983 is fixed.
-    tracked_objects::ScopedTracker tracking_profile5(
-        FROM_HERE_WITH_EXPLICIT_FUNCTION(
-            "454983 ProxyServiceFactory::CreateProxyService_5"));
-
     proxy_service = net::ProxyService::CreateUsingSystemProxyResolver(
         proxy_config_service,
         num_pac_threads,