Ensure that --disable-extensions disables extension prefs from being enacted

chrome/browser/extensions/extension_prefs_unittest.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 "base/message_loop.h"
 #include "base/path_service.h"
 #include "base/scoped_temp_dir.h"
 #include "base/stl_util.h"
 #include "base/string_number_conversions.h"
 #include "base/stringprintf.h"
@@ skipping 1093 matching lines @@
     testing::Mock::VerifyAndClearExpectations(v1i);
     testing::Mock::VerifyAndClearExpectations(v2);
     testing::Mock::VerifyAndClearExpectations(v2i);
   }
 
   virtual void Verify() {
   }
 };
 TEST_F(ExtensionPrefsSetExtensionControlledPref,
     ExtensionPrefsSetExtensionControlledPref) {}
+
+// Tests that the switches::kDisableExtensions command-line flag prevents
+// extension controlled preferences from being enacted.
+class ExtensionPrefsDisableExtensions
+    : public ExtensionPrefsPreferencesBase {
+ public:
+  ExtensionPrefsDisableExtensions()
+      : iteration_(0) {}
+  virtual ~ExtensionPrefsDisableExtensions() {}
+  virtual void Initialize() {
+    InstallExtControlledPref(ext1_, kPref1, Value::CreateStringValue("val1"));
+    // This becomes only active in the second verification phase.
+    prefs_.set_extensions_disabled(true);
+  }
+  virtual void Verify() {
+    std::string actual = prefs()->pref_service()->GetString(kPref1);
+    if (iteration_ == 0) {
+      EXPECT_EQ("val1", actual);
+      ++iteration_;
+    } else {
+      EXPECT_EQ(kDefaultPref1, actual);
+    }
+  }
+
+ private:
+  int iteration_;
+};
+TEST_F(ExtensionPrefsDisableExtensions, ExtensionPrefsDisableExtensions) {}