Merge pull request #4987 from johnmccutchan/hot_mode_tweaks

Tweaks to --hot mode

packages/flutter_tools/lib/src/devfs.dart

@@ -80,14 +80,14 @@ class ServiceProtocolDevFSOperations implements DevFSOperations {
     }
     String fileContents = BASE64.encode(bytes);
     try {
-    return await serviceProtocol.sendRequest('_writeDevFSFile',
-                                             <String, dynamic> {
-                                                'fsName': fsName,
-                                                'path': entry.devicePath,
-                                                'fileContents': fileContents
-                                             });
+      return await serviceProtocol.sendRequest('_writeDevFSFile',
+                                               <String, dynamic> {
+                                                  'fsName': fsName,
+                                                  'path': entry.devicePath,
+                                                  'fileContents': fileContents
+                                               });
     } catch (e) {
-      print('failed on ${entry.devicePath} $e');
+      printTrace('DevFS: Failed to write ${entry.devicePath}: $e');
     }
   }
 

packages/flutter_tools/lib/src/run.dart

@@ -345,9 +345,9 @@ class RunAndStayResident {
       });
     }
 
-    printStatus('DevFS: Updating files on device...');
+    Status devFSStatus = logger.startProgress('Updating files on device...');
     await _devFS.update();
-    printStatus('DevFS: Finished updating files on device...');
+    devFSStatus.stop(showElapsedTime: true);
     return true;
   }