3 files changed, 9 insertions, 4 deletions
diff --git a/chrome/browser/extensions/state_store.h b/chrome/browser/extensions/state_store.h
index 8e8ef7a..54f5995 100644
--- a/chrome/browser/extensions/state_store.h
+++ b/chrome/browser/extensions/state_store.h
@@ -26,6 +26,7 @@ class StateStore
   typedef ValueStoreFrontend::ReadCallback ReadCallback;
 
   StateStore(Profile* profile, const FilePath& db_path);
+  // This variant is useful for testing (using a mock ValueStore).
   StateStore(Profile* profile, ValueStore* store);
   virtual ~StateStore();
 
diff --git a/chrome/browser/value_store/value_store_frontend.cc b/chrome/browser/value_store/value_store_frontend.cc
index 58dd258..b820155 100644
--- a/chrome/browser/value_store/value_store_frontend.cc
+++ b/chrome/browser/value_store/value_store_frontend.cc
@@ -13,7 +13,6 @@ using content::BrowserThread;
 class ValueStoreFrontend::Backend : public base::RefCountedThreadSafe<Backend> {
  public:
   Backend() : storage_(NULL) {}
-  explicit Backend(ValueStore* storage) : storage_(storage) {}
 
   void Init(const FilePath& db_path) {
     DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
@@ -23,10 +22,11 @@ class ValueStoreFrontend::Backend : public base::RefCountedThreadSafe<Backend> {
       storage_ = new FailingValueStore();
   }
 
-  void InitWithStore(ValueStore* storage) {
+  // This variant is useful for testing (using a mock ValueStore).
+  void InitWithStore(scoped_ptr<ValueStore> storage) {
     DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
     DCHECK(!storage_);
-    storage_ = storage;
+    storage_ = storage.release();
   }
 
   void Get(const std::string& key,
@@ -90,7 +90,10 @@ ValueStoreFrontend::ValueStoreFrontend(const FilePath& db_path)
 }
 
 ValueStoreFrontend::ValueStoreFrontend(ValueStore* value_store)
-    : backend_(new Backend(value_store)) {
+    : backend_(new Backend()) {
+  BrowserThread::PostTask(BrowserThread::FILE, FROM_HERE,
+      base::Bind(&ValueStoreFrontend::Backend::InitWithStore,
+                 backend_, base::Passed(scoped_ptr<ValueStore>(value_store))));
 }
 
 ValueStoreFrontend::~ValueStoreFrontend() {
diff --git a/chrome/browser/value_store/value_store_frontend.h b/chrome/browser/value_store/value_store_frontend.h
index d5d96dd..ad8dc78 100644
--- a/chrome/browser/value_store/value_store_frontend.h
+++ b/chrome/browser/value_store/value_store_frontend.h
@@ -26,6 +26,7 @@ class ValueStoreFrontend
   typedef base::Callback<void(scoped_ptr<base::Value>)> ReadCallback;
 
   explicit ValueStoreFrontend(const FilePath& db_path);
+  // This variant is useful for testing (using a mock ValueStore).
   explicit ValueStoreFrontend(ValueStore* value_store);
   ~ValueStoreFrontend();