Retry reinstallation of corrupted policy extensions.

extensions/browser/content_hash_fetcher_unittest.cc

Index: extensions/browser/content_hash_fetcher_unittest.cc
diff --git a/extensions/browser/content_hash_fetcher_unittest.cc b/extensions/browser/content_hash_fetcher_unittest.cc
index 4323d7a9ada38c105647a4a95a9c4ea26c80d361..2d01fb1fa7c9a4761b89c54d83d08e190b9f357e 100644
--- a/extensions/browser/content_hash_fetcher_unittest.cc
+++ b/extensions/browser/content_hash_fetcher_unittest.cc
@@ -85,6 +85,9 @@ class ContentHashFetcherWaiter {
 // Used in setting up the behavior of our ContentHashFetcher.
 class MockDelegate : public ContentVerifierDelegate {
  public:
+  MockDelegate() {}
+  ~MockDelegate() override {}
+
   ContentVerifierDelegate::Mode ShouldBeVerified(
       const Extension& extension) override {
     return ContentVerifierDelegate::ENFORCE_STRICT;
@@ -113,6 +116,11 @@ class MockDelegate : public ContentVerifierDelegate {
                     ContentVerifyJob::FailureReason reason) override {
     ADD_FAILURE() << "Unexpected call for this test";
   }
+
+  void Shutdown() override {}
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(MockDelegate);
 };
 
 class ContentHashFetcherTest : public ExtensionsTest {