First part to fix Bug 50726 "Save extension list and "winning" prefs from extensions"

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 c8d1967a70a3efd26e5eb88d3d55f62c1198e218..2213cc9519cd9179c6b66b00d11434d22d2ea11a 100644
--- a/chrome/browser/extensions/extension_prefs_unittest.cc
+++ b/chrome/browser/extensions/extension_prefs_unittest.cc
@@ -367,3 +367,28 @@ private:
   scoped_refptr<Extension> extension_;
 };
 TEST_F(ExtensionPrefsAppLaunchIndex, ExtensionPrefsAppLaunchIndex) {}
+
+class ExtensionPrefsPrecedences : public ExtensionPrefsTest {
+ public:
+  virtual void Initialize() {
+    std::vector<std::string> precedence;
+    prefs()->GetExtensionPrecedences(&precedence);
+    EXPECT_EQ(0u, precedence.size());
+  }
+
+  virtual void Verify() {
+    std::vector<std::string> precedence;
+    precedence.push_back("A");
+    precedence.push_back("C");
+    precedence.push_back("B");
+    prefs()->PersistExtensionPrecedences(precedence);
+
+    prefs_.RecreateExtensionPrefs();
+
+    std::vector<std::string> retrieved_precedence;
+    prefs()->GetExtensionPrecedences(&retrieved_precedence);
+    EXPECT_EQ(precedence, retrieved_precedence);
+  }
+};
+TEST_F(ExtensionPrefsPrecedences, ExtensionPrefsPrecedences) {}
+