Add Browser Error Category (#17)

* error category

* error category

browser/BrowserPerf.proto

@@ -46,7 +46,7 @@ message BrowserPerfData {
 }
 
 message BrowserErrorLog {
-    string catalog = 1;
+    ErrorCategory category = 1;
     string grade = 2;
     string message = 3;
     int32 line = 4;
@@ -57,6 +57,15 @@ message BrowserErrorLog {
     int64 time = 8;
 }
 
+enum ErrorCategory {
+    ajax = 0;
+    resource = 1;
+    vue = 2;
+    promise = 3;
+    js = 4;
+    unknown = 5;
+}
+
 message PerfDetail {
     // Unit of all time related field should be `ms`.
     int32 redirectTime = 1;