Restart the browsing data counters when the CBD dialog is opened.

chrome/browser/resources/options/clear_browser_data_overlay.js

Index: chrome/browser/resources/options/clear_browser_data_overlay.js
diff --git a/chrome/browser/resources/options/clear_browser_data_overlay.js b/chrome/browser/resources/options/clear_browser_data_overlay.js
index e59811120b28f5f70a0ec5d9120e03fee533fffa..e6b5612a33c71bec3991ad9a0b5cec0ce1f27960 100644
--- a/chrome/browser/resources/options/clear_browser_data_overlay.js
+++ b/chrome/browser/resources/options/clear_browser_data_overlay.js
@@ -90,6 +90,11 @@ cr.define('options', function() {
       this.updateStateOfControls_();
     },
 
+    /** @override */
+    didShowPage: function() {
+      chrome.send('openedClearBrowserData');
+    },
+
     /**
      * Create a footer that explains that some content is not cleared by the
      * clear browsing data dialog and warns that the deletion may be synced.