Only send the client-side phishing model to a renderer if its profile has SafeBrowsing enabled.

chrome/renderer/safe_browsing/phishing_classifier_delegate.cc

 // 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.
 
 #include "chrome/renderer/safe_browsing/phishing_classifier_delegate.h"
 
 #include <set>
 
 #include "base/callback.h"
 #include "base/lazy_instance.h"
@@ skipping 47 matching lines @@
     const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(PhishingClassifierFilter, message)
     IPC_MESSAGE_HANDLER(SafeBrowsingMsg_SetPhishingModel, OnSetPhishingModel)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
 }
 
 void PhishingClassifierFilter::OnSetPhishingModel(const std::string& model) {
-  safe_browsing::Scorer* scorer = safe_browsing::Scorer::Create(model);
-  if (!scorer) {
-    DLOG(ERROR) << "Unable to create a PhishingScorer - corrupt model?";
-    return;
+  safe_browsing::Scorer* scorer = NULL;
+  // An empty model string means we should disable client-side phishing
+  // detection.
+  if (!model.empty()) {
+    scorer = safe_browsing::Scorer::Create(model);
+    if (!scorer) {
+      DLOG(ERROR) << "Unable to create a PhishingScorer - corrupt model?";
+      return;
+    }
   }
   PhishingClassifierDelegates::iterator i;
   for (i = g_delegates.Get().begin(); i != g_delegates.Get().end(); ++i) {
     (*i)->SetPhishingScorer(scorer);
   }
   g_phishing_scorer.Get().reset(scorer);
 }
 
 // static
 PhishingClassifierDelegate* PhishingClassifierDelegate::Create(
@@ skipping 192 matching lines @@
 
   VLOG(2) << "Starting classification for " << last_finished_load_url_;
   last_url_sent_to_classifier_ = last_finished_load_url_;
   is_classifying_ = true;
   classifier_->BeginClassification(
       &classifier_page_text_,
       NewCallback(this, &PhishingClassifierDelegate::ClassificationDone));
 }
 
 }  // namespace safe_browsing