Fix UMA naming.

chrome/browser/ui/javascript_dialogs/javascript_dialog_tab_helper.cc

 // Copyright 2016 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/ui/javascript_dialogs/javascript_dialog_tab_helper.h"
 
 #include "base/feature_list.h"
 #include "base/metrics/histogram_macros.h"
 #include "chrome/browser/engagement/site_engagement_service.h"
 #include "chrome/browser/profiles/profile.h"
@@ skipping 35 matching lines @@
     const base::string16& default_prompt_text,
     const DialogClosedCallback& callback,
     bool* did_suppress_message) {
   SiteEngagementService* site_engagement_service = SiteEngagementService::Get(
       Profile::FromBrowserContext(web_contents->GetBrowserContext()));
   double engagement_score = site_engagement_service->GetScore(origin_url);
   UMA_HISTOGRAM_PERCENTAGE("JSDialogs.SiteEngagementOfDialogs",
                            engagement_score);
   int32_t message_length = static_cast<int32_t>(message_text.length());
   if (engagement_score == 0) {
-    UMA_HISTOGRAM_COUNTS("JSDialogs.CountOfCharacters.EngagementNone",
+    UMA_HISTOGRAM_COUNTS("JSDialogs.CharacterCount.EngagementNone",
                          message_length);
   } else if (engagement_score < 1) {
-    UMA_HISTOGRAM_COUNTS("JSDialogs.CountOfCharacters.EngagementLessThanOne",
+    UMA_HISTOGRAM_COUNTS("JSDialogs.CharacterCount.EngagementLessThanOne",
                          message_length);
   } else if (engagement_score < 5) {
-    UMA_HISTOGRAM_COUNTS("JSDialogs.CountOfCharacters.EngagementOneToFive",
+    UMA_HISTOGRAM_COUNTS("JSDialogs.CharacterCount.EngagementOneToFive",
                          message_length);
   } else {
-    UMA_HISTOGRAM_COUNTS("JSDialogs.CountOfCharacters.EngagementHigher",
+    UMA_HISTOGRAM_COUNTS("JSDialogs.CharacterCount.EngagementHigher",
                          message_length);
   }
 
   if (IsEnabled()) {
     NOTREACHED() << "auto-dismissing dialog code does not yet exist";
   } else {
     AppModalDialogManager()->RunJavaScriptDialog(
         web_contents, origin_url, message_type, message_text,
         default_prompt_text, callback, did_suppress_message);
   }
@@ skipping 48 matching lines @@
 }
 
 void JavaScriptDialogTabHelper::ResetDialogState(
     content::WebContents* web_contents) {
   // Reset any app-modal dialog state that may exist.
   if (!IsEnabled())
     return AppModalDialogManager()->ResetDialogState(web_contents);
 
   // More work here for the auto-dismissing dialogs.
 }