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

chrome/browser/extensions/extension_prefs_unittest.cc

Index: chrome/browser/extensions/extension_prefs_unittest.cc
diff --git a/chrome/browser/extensions/extension_prefs_unittest.cc b/chrome/browser/extensions/extension_prefs_unittest.cc
index b536410f3a463ef3cc3d750a47f39124619aa8ce..d10e1839d6d7b87baac2655ef2f5e66a4c5cf35d 100644
--- a/chrome/browser/extensions/extension_prefs_unittest.cc
+++ b/chrome/browser/extensions/extension_prefs_unittest.cc
@@ -1111,3 +1111,31 @@ class ExtensionPrefsSetExtensionControlledPref
 };
 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) {}