Propagate more information about ValueStore errors to callers, notably an

chrome/browser/value_store/value_store_unittest.cc

Index: chrome/browser/value_store/value_store_unittest.cc
diff --git a/chrome/browser/value_store/value_store_unittest.cc b/chrome/browser/value_store/value_store_unittest.cc
index d45f647891f7811bc3cbf17d90618a7e7daf6a11..0e8847cf7b20e4b2b744aed633e0e8241149ad4f 100644
--- a/chrome/browser/value_store/value_store_unittest.cc
+++ b/chrome/browser/value_store/value_store_unittest.cc
@@ -56,11 +56,11 @@ testing::AssertionResult SettingsEq(
     ValueStore::ReadResult actual_result) {
   if (actual_result->HasError()) {
     return testing::AssertionFailure() <<
-        "Result has error: " << actual_result->error();
+        "Result has error: " << actual_result->error().message;
   }
 
   std::string error;
-  if (!ValuesEqual(&expected, actual_result->settings().get(), &error)) {
+  if (!ValuesEqual(&expected, &actual_result->settings(), &error)) {
     return testing::AssertionFailure() << error;
   }
 
@@ -75,7 +75,7 @@ testing::AssertionResult ChangesEq(
     ValueStore::WriteResult actual_result) {
   if (actual_result->HasError()) {
     return testing::AssertionFailure() <<
-        "Result has error: " << actual_result->error();
+        "Result has error: " << actual_result->error().message;
   }
 
   const ValueStoreChangeList& actual = actual_result->changes();