[tools] Format JS files in system-analyzer/ if they're unformatted

Instead of just warning, let's try to format the files as well

Bug: v8:10670
Change-Id: I0dfbdc0ed4a96af7f2a2a472f1d0d3d332d39c90
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2523193
Commit-Queue: Sathya Gunasekaran  <gsathya@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Auto-Submit: Sathya Gunasekaran  <gsathya@chromium.org>
Cr-Commit-Position: refs/heads/master@{#71076}

PRESUBMIT.py

@@ -99,7 +99,7 @@ def _V8PresubmitChecks(input_api, output_api):
   def FilterJSFile(affected_file):
     return input_api.FilterSourceFile(
       affected_file,
-      white_list=(r'.+\.m?js'))
+      files_to_check=(r'.+\.m?js'))
 
   results = []
   if not CppLintProcessor().RunOnFiles(

tools/v8_presubmit.py

@@ -132,6 +132,7 @@ def TorqueLintWorker(command):
     process.kill()
 
 def JSLintWorker(command):
+  def format_file(command):
     try:
       file_name = command[-1]
       with open(file_name, "r") as file_handle:
@@ -145,7 +146,6 @@ def JSLintWorker(command):
         return rc
 
       if output != contents:
-      sys.stdout.write(file_name + " requires formatting.\n")
         return 1
 
       return 0
@@ -156,6 +156,14 @@ def JSLintWorker(command):
             ' in your $PATH. Lint check skipped.')
       process.kill()
 
+  rc = format_file(command)
+  if rc == 1:
+    # There are files that need to be formatted, let's format them in place.
+    file_name = command[-1]
+    sys.stdout.write("Formatting %s.\n" % (file_name))
+    rc = format_file(command[:-1] + ["-i", file_name])
+  return rc
+
 class FileContentsCache(object):
 
   def __init__(self, sums_file_name):