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

chrome/renderer/safe_browsing/phishing_classifier_browsertest.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.
 //
 // Note that although this is not a "browser" test, it runs as part of
 // browser_tests.  This is because WebKit does not work properly if it is
 // shutdown and re-initialized.  Since browser_tests runs each test in a
 // new process, this avoids the problem.
 
 #include "chrome/renderer/safe_browsing/phishing_classifier.h"
@@ skipping 175 matching lines @@
   EXPECT_EQ(0U, features.features().size());
   EXPECT_EQ(PhishingClassifier::kInvalidScore, phishy_score);
 
   // Extraction should fail for this case because the URL is a POST request.
   LoadURLWithPost("http://host.net/");
   EXPECT_FALSE(RunPhishingClassifier(&page_text, &phishy_score, &features));
   EXPECT_EQ(0U, features.features().size());
   EXPECT_EQ(PhishingClassifier::kInvalidScore, phishy_score);
 }
 
+TEST_F(PhishingClassifierTest, DisableDetection) {
+  // No scorer yet, so the classifier is not ready.
+  EXPECT_FALSE(classifier_->is_ready());
+
+  // Now set the scorer.
+  classifier_->set_phishing_scorer(scorer_.get());
+  EXPECT_TRUE(classifier_->is_ready());
+
+  // Set a NULL scorer, which turns detection back off.
+  classifier_->set_phishing_scorer(NULL);
+  EXPECT_FALSE(classifier_->is_ready());
+}
+
 }  // namespace safe_browsing