Implement a DRIVE_REQUEST_TOO_LARGE backoff.

google_apis/drive/base_requests.cc

Index: google_apis/drive/base_requests.cc
diff --git a/google_apis/drive/base_requests.cc b/google_apis/drive/base_requests.cc
index 604324491df920cacca74f339eb48cb153594a67..e526012eeccc41ccbb1735c1a18e41ee01dd7931 100644
--- a/google_apis/drive/base_requests.cc
+++ b/google_apis/drive/base_requests.cc
@@ -152,6 +152,7 @@ google_apis::DriveApiErrorCode MapJsonError(
   const char kErrorReasonRateLimitExceeded[] = "rateLimitExceeded";
   const char kErrorReasonUserRateLimitExceeded[] = "userRateLimitExceeded";
   const char kErrorReasonQuotaExceeded[] = "quotaExceeded";
+  const char kErrorReasonResponseTooLarge[] = "responseTooLarge";
 
   scoped_ptr<const base::Value> value(google_apis::ParseJson(error_body));
   const base::DictionaryValue* dictionary = NULL;
@@ -177,6 +178,8 @@ google_apis::DriveApiErrorCode MapJsonError(
       }
       if (reason == kErrorReasonQuotaExceeded)
         return google_apis::DRIVE_NO_SPACE;
+      if (reason == kErrorReasonResponseTooLarge)
+        return google_apis::DRIVE_RESPONSE_TOO_LARGE;
     }
   }