Use factory to create histograms, and refcounts to track lifetimes...

chrome/browser/chrome_browser_application_mac.mm

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "chrome/browser/chrome_browser_application_mac.h"
 
 #import "base/histogram.h"
 #import "base/logging.h"
 #import "base/scoped_nsobject.h"
 #import "base/sys_string_conversions.h"
@@ skipping 73 matching lines @@
   const NSString* name = [exception name];
   for (int i = 0; kKnownNSExceptionNames[i]; ++i) {
     if (name == kKnownNSExceptionNames[i]) {
       return i;
     }
   }
   return kUnknownNSException;
 }
 
 void RecordExceptionWithUma(NSException* exception) {
-  static LinearHistogram histogram("OSX.NSException", 0, kUnknownNSException,
-                                   kUnknownNSException + 1);
-  histogram.SetFlags(kUmaTargetedHistogramFlag);
-  histogram.Add(BinForException(exception));
+  static scoped_refptr<Histogram> histogram =
+      LinearHistogram::LinearHistogramFactoryGet("OSX.NSException",
+          0, kUnknownNSException, kUnknownNSException + 1);
+  histogram->SetFlags(kUmaTargetedHistogramFlag);
+  histogram->Add(BinForException(exception));
 }
 
 void Terminate() {
   [NSApp terminate:nil];
 }
 
 }  // namespace chrome_browser_application_mac
 
 namespace {
 
@@ skipping 175 matching lines @@
       SetCrashKeyValue(kLastExceptionKey, value);
     }
 
     reportingException = NO;
   }
 
   [super reportException:anException];
 }
 
 @end