Make UMA_HISTOGRAM_ENUMERATION work with scoped enums.

chrome/browser/devtools/devtools_ui_bindings.cc

 // Copyright 2014 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.
 
 #include "chrome/browser/devtools/devtools_ui_bindings.h"
 
 #include <stddef.h>
 
 #include <memory>
 #include <utility>
@@ skipping 1043 matching lines @@
                                                    int boundary_value) {
   if (!frontend_host_)
     return;
   if (!(boundary_value >= 0 && boundary_value <= 100 && sample >= 0 &&
         sample < boundary_value)) {
     // TODO(nick): Replace with chrome::bad_message::ReceivedBadMessage().
     frontend_host_->BadMessageRecieved();
     return;
   }
   // Each histogram name must follow a different code path in
-  // order to UMA_HISTOGRAM_ENUMERATION work correctly.
+  // order to UMA_HISTOGRAM_EXACT_LINEAR work correctly.
   if (name == kDevToolsActionTakenHistogram)
-    UMA_HISTOGRAM_ENUMERATION(name, sample, boundary_value);
+    UMA_HISTOGRAM_EXACT_LINEAR(name, sample, boundary_value);
   else if (name == kDevToolsPanelShownHistogram)
-    UMA_HISTOGRAM_ENUMERATION(name, sample, boundary_value);
+    UMA_HISTOGRAM_EXACT_LINEAR(name, sample, boundary_value);
   else
     frontend_host_->BadMessageRecieved();
 }
 
 void DevToolsUIBindings::SendJsonRequest(const DispatchCallback& callback,
                                          const std::string& browser_id,
                                          const std::string& url) {
   if (!android_bridge_) {
     callback.Run(nullptr);
     return;
@@ skipping 291 matching lines @@
 void DevToolsUIBindings::FrontendLoaded() {
   if (frontend_loaded_)
     return;
   frontend_loaded_ = true;
 
   // Call delegate first - it seeds importants bit of information.
   delegate_->OnLoadCompleted();
 
   AddDevToolsExtensionsToClient();
 }