[Pepper] Use platform path for QuotaReservation::GetOpenFileHandle

webkit/browser/fileapi/quota/quota_reservation_buffer.cc

Index: webkit/browser/fileapi/quota/quota_reservation_buffer.cc
diff --git a/webkit/browser/fileapi/quota/quota_reservation_buffer.cc b/webkit/browser/fileapi/quota/quota_reservation_buffer.cc
index 80d3699665ceaa755169726f145c1781aaec65f8..14ea0d0cd8123022c072fa33faf7b84c26738e6f 100644
--- a/webkit/browser/fileapi/quota/quota_reservation_buffer.cc
+++ b/webkit/browser/fileapi/quota/quota_reservation_buffer.cc
@@ -46,8 +46,13 @@ void QuotaReservationBuffer::CommitFileGrowth(int64 quota_consumption,
     return;
   reservation_manager_->CommitQuotaUsage(origin_, type_, usage_delta);
 
-  DCHECK_LE(quota_consumption, reserved_quota_);
   if (quota_consumption > 0) {
+    if (quota_consumption > reserved_quota_) {
+      LOG(ERROR) << "Detected over consumption of the storage quota beyond its"
+                 << " reservation";
+      quota_consumption = reserved_quota_;
+    }
+
     reserved_quota_ -= quota_consumption;
     reservation_manager_->ReleaseReservedQuota(
         origin_, type_, quota_consumption);