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

chrome/renderer/safe_browsing/phishing_classifier.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.h"
 
 #include <string>
 
 #include "base/callback.h"
 #include "base/compiler_specific.h"
@@ skipping 35 matching lines @@
 
 PhishingClassifier::~PhishingClassifier() {
   // The RenderView should have called CancelPendingClassification() before
   // we are destroyed.
   CheckNoPendingClassification();
 }
 
 void PhishingClassifier::set_phishing_scorer(const Scorer* scorer) {
   CheckNoPendingClassification();
   scorer_ = scorer;
-  url_extractor_.reset(new PhishingUrlFeatureExtractor);
-  dom_extractor_.reset(
-      new PhishingDOMFeatureExtractor(render_view_, clock_.get()));
-  term_extractor_.reset(new PhishingTermFeatureExtractor(
-      &scorer_->page_terms(),
-      &scorer_->page_words(),
-      scorer_->max_words_per_term(),
-      scorer_->murmurhash3_seed(),
-      clock_.get()));
+  if (scorer_) {
+    url_extractor_.reset(new PhishingUrlFeatureExtractor);
+    dom_extractor_.reset(
+        new PhishingDOMFeatureExtractor(render_view_, clock_.get()));
+    term_extractor_.reset(new PhishingTermFeatureExtractor(
+        &scorer_->page_terms(),
+        &scorer_->page_words(),
+        scorer_->max_words_per_term(),
+        scorer_->murmurhash3_seed(),
+        clock_.get()));
+  } else {
+    // We're disabling client-side phishing detection, so tear down all
+    // of the relevant objects.
+    url_extractor_.reset();
+    dom_extractor_.reset();
+    term_extractor_.reset();
+  }
 }
 
 bool PhishingClassifier::is_ready() const {
   return scorer_ != NULL;
 }
 
 void PhishingClassifier::BeginClassification(const string16* page_text,
                                              DoneCallback* done_callback) {
   DCHECK(is_ready());
 
@@ skipping 145 matching lines @@
   RunCallback(verdict);
 }
 
 void PhishingClassifier::Clear() {
   page_text_ = NULL;
   done_callback_.reset(NULL);
   features_.reset(NULL);
 }
 
 }  // namespace safe_browsing