Add some histograms to see how often users click through blocking pages....

chrome/browser/ssl/ssl_blocking_page.cc

 // Copyright (c) 2006-2008 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/ssl/ssl_blocking_page.h"
 
+#include "base/histogram.h"
 #include "base/string_piece.h"
 #include "base/values.h"
 #include "chrome/browser/browser.h"
 #include "chrome/browser/cert_store.h"
 #include "chrome/browser/dom_operation_notification_details.h"
 #include "chrome/browser/ssl/ssl_error_info.h"
 #include "chrome/browser/tab_contents/navigation_controller.h"
 #include "chrome/browser/tab_contents/navigation_entry.h"
 #include "chrome/browser/tab_contents/web_contents.h"
 #include "chrome/common/jstemplate_builder.h"
 #include "chrome/common/l10n_util.h"
 #include "chrome/common/notification_service.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/common/pref_service.h"
 #include "chrome/common/resource_bundle.h"
 #include "grit/browser_resources.h"
 #include "grit/generated_resources.h"
 
+namespace {
+
+enum SSLBlockingPageEvent {
+  SHOW,
+  PROCEED,
+  DONT_PROCEED,
+};
+
+void RecordSSLBlockingPageStats(SSLBlockingPageEvent event) {
+  static LinearHistogram histogram("interstial.ssl", 0, 2, 4);
+  histogram.SetFlags(kUmaTargetedHistogramFlag);
+  histogram.Add(event);
+}
+
+}  // namespace
+
 // Note that we always create a navigation entry with SSL errors.
 // No error happening loading a sub-resource triggers an interstitial so far.
 SSLBlockingPage::SSLBlockingPage(SSLManager::CertError* error,
                                  Delegate* delegate)
     : InterstitialPage(error->GetWebContents(), true, error->request_url()),
       error_(error),
       delegate_(delegate),
       delegate_has_been_notified_(false) {
+  RecordSSLBlockingPageStats(SHOW);
 }
 
 SSLBlockingPage::~SSLBlockingPage() {
   if (!delegate_has_been_notified_) {
     // The page is closed without the user having chosen what to do, default to
     // deny.
     NotifyDenyCertificate();
   }
 }
 
@@ skipping 44 matching lines @@
 
 void SSLBlockingPage::CommandReceived(const std::string& command) {
   if (command == "1") {
     Proceed();
   } else {
     DontProceed();
   }
 }
 
 void SSLBlockingPage::Proceed() {
+  RecordSSLBlockingPageStats(PROCEED);
+
   // Accepting the certificate resumes the loading of the page.
   NotifyAllowCertificate();
 
   // This call hides and deletes the interstitial.
   InterstitialPage::Proceed();
 }
 
 void SSLBlockingPage::DontProceed() {
+  RecordSSLBlockingPageStats(DONT_PROCEED);
+
   NotifyDenyCertificate();
   InterstitialPage::DontProceed();
 }
 
-
 void SSLBlockingPage::NotifyDenyCertificate() {
   DCHECK(!delegate_has_been_notified_);
 
   delegate_->OnDenyCertificate(error_);
   delegate_has_been_notified_ = true;
 }
 
 void SSLBlockingPage::NotifyAllowCertificate() {
   DCHECK(!delegate_has_been_notified_);
 
@@ skipping 10 matching lines @@
       L"moreInfo1", L"moreInfo2", L"moreInfo3", L"moreInfo4", L"moreInfo5"
   };
   int i;
   for (i = 0; i < static_cast<int>(extra_info.size()); i++) {
     strings->SetString(keys[i], extra_info[i]);
   }
   for (;i < 5; i++) {
     strings->SetString(keys[i], L"");
   }
 }