Fix quota value overflow (reland).

BUG=104111
TEST='QuotaManagerTest.*'


Review URL: http://codereview.chromium.org/8528022

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@109871 0039d316-1c4b-4281-b951-d872f2087c98

webkit/quota/quota_manager.cc

@@ -755,7 +755,7 @@ class QuotaManager::UpdatePersistentHostQuotaTask
   UpdatePersistentHostQuotaTask(
       QuotaManager* manager,
       const std::string& host,
-      int new_quota,
+      int64 new_quota,
       const HostQuotaCallback& callback)
       : DatabaseTaskBase(manager),
         host_(host),

webkit/quota/quota_manager_unittest.cc

@@ -895,10 +895,10 @@ TEST_F(QuotaManagerTest, GetAndSetPerststentHostQuota) {
   GetPersistentHostQuota("foo.com");
   SetPersistentHostQuota("foo.com", 200);
   GetPersistentHostQuota("foo.com");
-  SetPersistentHostQuota("foo.com", 300);
+  SetPersistentHostQuota("foo.com", 300000000000ll);
   GetPersistentHostQuota("foo.com");
   MessageLoop::current()->RunAllPending();
-  EXPECT_EQ(300, quota());
+  EXPECT_EQ(300000000000ll, quota());
 }
 
 TEST_F(QuotaManagerTest, GetAndSetPersistentUsageAndQuota) {