Change default content verification mode for Google Chrome builds

chrome/browser/extensions/chrome_content_verifier_delegate.cc

 // Copyright 2015 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/extensions/chrome_content_verifier_delegate.h"
 
 #include "base/base_switches.h"
 #include "base/command_line.h"
 #include "base/metrics/field_trial.h"
 #include "base/metrics/histogram.h"
@@ skipping 23 matching lines @@
     "ExtensionContentVerification";
 
 }  // namespace
 
 namespace extensions {
 
 // static
 ContentVerifierDelegate::Mode ChromeContentVerifierDelegate::GetDefaultMode() {
   base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
 
-  Mode experiment_value = NONE;
+  Mode experiment_value;
+#if defined(GOOGLE_CHROME_BUILD)
+  experiment_value = ContentVerifierDelegate::ENFORCE;
+#else
+  experiment_value = ContentVerifierDelegate::NONE;
+#endif
   const std::string group =
       base::FieldTrialList::FindFullName(kContentVerificationExperimentName);
   if (group == "EnforceStrict")
     experiment_value = ContentVerifierDelegate::ENFORCE_STRICT;
   else if (group == "Enforce")
     experiment_value = ContentVerifierDelegate::ENFORCE;
   else if (group == "Bootstrap")
     experiment_value = ContentVerifierDelegate::BOOTSTRAP;
+  else if (group == "None")
+    experiment_value = ContentVerifierDelegate::NONE;
 
   // The field trial value that normally comes from the server can be
   // overridden on the command line, which we don't want to allow since
   // malware can set chrome command line flags. There isn't currently a way
   // to find out what the server-provided value is in this case, so we
   // conservatively default to the strictest mode if we detect our experiment
   // name being overridden.
   if (command_line->HasSwitch(switches::kForceFieldTrials)) {
     std::string forced_trials =
         command_line->GetSwitchValueASCII(switches::kForceFieldTrials);
@@ skipping 116 matching lines @@
 void ChromeContentVerifierDelegate::LogFailureForPolicyForceInstall(
     const std::string& extension_id) {
   if (!ContainsKey(corrupt_policy_extensions_, extension_id)) {
     corrupt_policy_extensions_.insert(extension_id);
     UMA_HISTOGRAM_BOOLEAN("Extensions.CorruptPolicyExtensionWouldBeDisabled",
                           true);
   }
 }
 
 }  // namespace extensions