Remove some unused proxy-related histograms.

net/proxy/multi_threaded_proxy_resolver.cc

Index: net/proxy/multi_threaded_proxy_resolver.cc
diff --git a/net/proxy/multi_threaded_proxy_resolver.cc b/net/proxy/multi_threaded_proxy_resolver.cc
index cab22ab275909f96b0c3eb29583fe3e589d87d68..4b68321a4023d5df4b2c9b1944ff1b6107931eb2 100644
--- a/net/proxy/multi_threaded_proxy_resolver.cc
+++ b/net/proxy/multi_threaded_proxy_resolver.cc
@@ -7,7 +7,6 @@
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/message_loop/message_loop_proxy.h"
-#include "base/metrics/histogram.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/threading/thread.h"
@@ -219,7 +218,6 @@ class MultiThreadedProxyResolver::GetProxyForURLJob
         url_(url),
         was_waiting_for_thread_(false) {
     DCHECK(!callback.is_null());
-    start_time_ = base::TimeTicks::Now();
   }
 
   BoundNetLog* net_log() { return &net_log_; }
@@ -232,8 +230,6 @@ class MultiThreadedProxyResolver::GetProxyForURLJob
   virtual void FinishedWaitingForThread() OVERRIDE {
     DCHECK(executor());
 
-    submitted_to_thread_time_ = base::TimeTicks::Now();
-
     if (was_waiting_for_thread_) {
       net_log_.EndEvent(NetLog::TYPE_WAITING_FOR_PROXY_RESOLVER_THREAD);
     }
@@ -263,7 +259,6 @@ class MultiThreadedProxyResolver::GetProxyForURLJob
   void QueryComplete(int result_code) {
     // The Job may have been cancelled after it was started.
     if (!was_cancelled()) {
-      RecordPerformanceMetrics();
       if (result_code >= OK) {  // Note: unit-tests use values > 0.
         results_->Use(results_buf_);
       }
@@ -272,20 +267,6 @@ class MultiThreadedProxyResolver::GetProxyForURLJob
     OnJobCompleted();
   }
 
-  void RecordPerformanceMetrics() {
-    DCHECK(!was_cancelled());
-
-    base::TimeTicks now = base::TimeTicks::Now();
-
-    // Log the total time the request took to complete.
-    UMA_HISTOGRAM_MEDIUM_TIMES("Net.MTPR_GetProxyForUrl_Time",
-                               now - start_time_);
-
-    // Log the time the request was stalled waiting for a thread to free up.
-    UMA_HISTOGRAM_MEDIUM_TIMES("Net.MTPR_GetProxyForUrl_Thread_Wait_Time",
-                               submitted_to_thread_time_ - start_time_);
-  }
-
   // Must only be used on the "origin" thread.
   ProxyInfo* results_;
 
@@ -296,9 +277,6 @@ class MultiThreadedProxyResolver::GetProxyForURLJob
   // Usable from within DoQuery on the worker thread.
   ProxyInfo results_buf_;
 
-  base::TimeTicks start_time_;
-  base::TimeTicks submitted_to_thread_time_;
-
   bool was_waiting_for_thread_;
 };