NTP: Clean up of MetricsHandler class and namespacing chrome.send messages.

chrome/browser/resources/ntp/most_visited.js

 // Copyright (c) 2011 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.
 
 // Dependencies that we should remove/formalize:
 // util.js
 //
 // afterTransition
 // chrome.send
 // hideNotification
@@ skipping 85 matching lines @@
       updatePinnedDom(source, true);
 
       var destinationData = this.data[destinationIndex];
       // Only update the destination if it was pinned before.
       if (destinationData.pinned) {
         addPinnedUrl(destinationData, sourceIndex);
       }
       this.data[destinationIndex] = sourceData;
       this.data[sourceIndex] = destinationData;
 
-      chrome.send('recordAction', ['MostVisitedReordered']);
+      chrome.send('metricsHandler:recordAction', ['MostVisitedReordered']);
     },
 
     updateSettingsLink: function(hasBlacklistedUrls) {
       if (hasBlacklistedUrls)
         $('most-visited-settings').classList.add('has-blacklist');
       else
         $('most-visited-settings').classList.remove('has-blacklist');
     },
 
     blacklist: function(el) {
@@ skipping 416 matching lines @@
      * Record the time the mouse has been hovering over a thumbnail.
      * |clicked| must be true if the thumbnail was clicked, or false if
      * the cursor was moved off of the thumbnail.
      */
     RecordHoverTime_: function(clicked) {
       if (!this.hoverStartTime_)
         return;
       var hoverDuration = (new Date()).getTime() - this.hoverStartTime_;
       if (hoverDuration > 500)
         hoverDuration = 500;
-      chrome.send('recordInHistogram',
+      chrome.send('metricsHandler:recordInHistogram',
                   [clicked ? 'NewTabPage.HoverTimeClicked'
                            : 'NewTabPage.HoverTimeNotClicked',
                    hoverDuration,
                    500]);
       this.hoverStartTime_ = null;
     },
 
     /**
      * Record the time the cursor started hovering over a thumbnail.
      * Do nothing if currently dragging the thumbnail.
@@ skipping 131 matching lines @@
       } else if (target.classList.contains('remove')) {
         this.blacklist(getItem(target));
         e.preventDefault();
       } else {
         var item = getItem(target);
         if (item) {
           var index = Array.prototype.indexOf.call(item.parentNode.children,
                                                    item);
           this.RecordHoverTime_(true);
           if (index != -1)
-            chrome.send('recordInHistogram',
+            chrome.send('metricsHandler:recordInHistogram',
                         ['NewTabPage.MostVisited', index, 8]);
         }
       }
     },
 
     /**
      * Allow blacklisting most visited site using the keyboard.
      */
     handleKeyDown_: function(e) {
       if (!cr.isMac && e.keyCode == 46 || // Del
           cr.isMac && e.metaKey && e.keyCode == 8) { // Cmd + Backspace
         this.blacklist(e.target);
       }
     }
   };
 
   return MostVisited;
 })();