[webrunner] Fix LogLevel enum type uint32 -> int32

R=jamesr@google.com, kmarshall@chromium.org

Change-Id: I7ac18724e08194d45686c3f694c09d69db9025dd
Reviewed-on: https://chromium-review.googlesource.com/c/1352528
Commit-Queue: Miguel Flores <miguelfrde@google.com>
Reviewed-by: James Robinson <jamesr@chromium.org>
Reviewed-by: Kevin Marshall <kmarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#611423}

webrunner/browser/frame_impl.cc

@@ -432,7 +432,7 @@ bool FrameImpl::DidAddMessageToConsole(content::WebContents* source,
                                        int32_t line_no,
                                        const base::string16& source_id) {
   if (static_cast<std::underlying_type<chromium::web::LogLevel>::type>(
-          log_level_) > static_cast<uint32_t>(level)) {
+          log_level_) > level) {
     return false;
   }
 

webrunner/fidl/web/frame.fidl

@@ -13,7 +13,7 @@ enum ExecuteMode {
   ON_PAGE_LOAD = 2;    // Will evaluate the script on all subsequent page loads.
 };
 
-enum LogLevel {
+enum LogLevel : int32 {
   NONE = 100;  // No logging.
   DEBUG = -1;  // Outputs messages from console.debug().
   INFO = 0;    // Outputs messages from console.log().