Remove auth token generation timing histograms.

These didn't turn out to be terribly useful, and add some complexity to HttpAuthHandler.

BUG=NONE
TEST=targets build

Review URL: http://codereview.chromium.org/6103003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@70740 0039d316-1c4b-4281-b951-d872f2087c98

net/http/http_auth_handler.cc

@@ -5,7 +5,6 @@
 #include "net/http/http_auth_handler.h"
 
 #include "base/logging.h"
-#include "base/metrics/histogram.h"
 #include "base/string_util.h"
 #include "base/stringprintf.h"
 #include "net/base/net_errors.h"
@@ -26,12 +25,6 @@ HttpAuthHandler::HttpAuthHandler()
 HttpAuthHandler::~HttpAuthHandler() {
 }
 
-//static
-std::string HttpAuthHandler::GenerateHistogramNameFromScheme(
-    const std::string& scheme) {
-  return base::StringPrintf("Net.AuthGenerateToken_%s", scheme.c_str());
-}
-
 bool HttpAuthHandler::InitFromChallenge(
     HttpAuth::ChallengeTokenizer* challenge,
     HttpAuth::Target target,
@@ -53,13 +46,6 @@ bool HttpAuthHandler::InitFromChallenge(
   DCHECK(!ok || properties_ != -1);
   DCHECK(!ok || auth_scheme_ != AUTH_SCHEME_MAX);
 
-  if (ok)
-    histogram_ = base::Histogram::FactoryTimeGet(
-        GenerateHistogramNameFromScheme(scheme()),
-        base::TimeDelta::FromMilliseconds(1),
-        base::TimeDelta::FromSeconds(10), 50,
-        base::Histogram::kUmaTargetedHistogramFlag);
-
   return ok;
 }
 
@@ -90,10 +76,8 @@ int HttpAuthHandler::GenerateAuthToken(const string16* username,
   DCHECK(username != NULL || AllowsDefaultCredentials());
   DCHECK(auth_token != NULL);
   DCHECK(original_callback_ == NULL);
-  DCHECK(histogram_.get());
   original_callback_ = callback;
   net_log_.BeginEvent(EventTypeFromAuthTarget(target_), NULL);
-  generate_auth_token_start_ =  base::TimeTicks::Now();
   int rv = GenerateAuthTokenImpl(username, password, request,
                                  &wrapper_callback_, auth_token);
   if (rv != ERR_IO_PENDING)
@@ -118,10 +102,6 @@ void HttpAuthHandler::OnGenerateAuthTokenComplete(int rv) {
 
 void HttpAuthHandler::FinishGenerateAuthToken() {
   // TOOD(cbentzel): Should this be done in OK case only?
-  DCHECK(histogram_.get());
-  base::TimeDelta generate_auth_token_duration =
-      base::TimeTicks::Now() - generate_auth_token_start_;
-  histogram_->AddTime(generate_auth_token_duration);
   net_log_.EndEvent(EventTypeFromAuthTarget(target_), NULL);
   original_callback_ = NULL;
 }

net/http/http_auth_handler.h

@@ -9,15 +9,10 @@
 #include <string>
 
 #include "base/string16.h"
-#include "base/time.h"
 #include "net/base/completion_callback.h"
 #include "net/base/net_log.h"
 #include "net/http/http_auth.h"
 
-namespace base {
-class Histogram;
-}
-
 namespace net {
 
 struct HttpRequestInfo;
@@ -206,13 +201,9 @@ class HttpAuthHandler {
  private:
   void OnGenerateAuthTokenComplete(int rv);
   void FinishGenerateAuthToken();
-  static std::string GenerateHistogramNameFromScheme(const std::string& scheme);
 
   CompletionCallback* original_callback_;
   CompletionCallbackImpl<HttpAuthHandler> wrapper_callback_;
-  // When GenerateAuthToken was called.
-  base::TimeTicks generate_auth_token_start_;
-  scoped_refptr<base::Histogram> histogram_;
 };
 
 }  // namespace net