Revert 255357 "Change the user action file format from .txt to ...."

Believed to be behind the failures in the Linux builder:

http://build.chromium.org/p/chromium/builders/Linux/builds/47996

Errors in the log:

.../actions/print_style.py: Has executable bit but not shebang or ELF header
.../histograms/print_style.py: Has executable bit but not shebang or ELF header

Refers to files in the CL.

> Change the user action file format from .txt to .xml.
>
> In this way, more information can be added (currently added 'description' and 'owner' for each action)
>
> A few functions are moved from tools/metrics/histograms to tools/metrics/common to be shared by tools/metrics and tools/histograms.
>
> BUG=340735
> NOTRY=true
>
> Review URL: https://codereview.chromium.org/149503005

TBR=yiyaoliu@chromium.org

Review URL: https://codereview.chromium.org/188793003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@255404 0039d316-1c4b-4281-b951-d872f2087c98

PRESUBMIT.py

@@ -1014,32 +1014,28 @@ def _CheckCygwinShell(input_api, output_api):
 
 def _CheckUserActionUpdate(input_api, output_api):
   """Checks if any new user action has been added."""
-  if any('actions.xml' == input_api.os_path.basename(f) for f in
+  if any('chromeactions.txt' == input_api.os_path.basename(f) for f in
          input_api.LocalPaths()):
-    # If actions.xml is already included in the changelist, the PRESUBMIT
-    # for actions.xml will do a more complete presubmit check.
+    # If chromeactions.txt is already included in the changelist, the PRESUBMIT
+    # for chromeactions.txt will do a more complete presubmit check.
     return []
 
+  with open('tools/metrics/actions/chromeactions.txt') as f:
+    current_actions = f.read()
+
   file_filter = lambda f: f.LocalPath().endswith(('.cc', '.mm'))
   action_re = r'[^a-zA-Z]UserMetricsAction\("([^"]*)'
-  current_actions = None
   for f in input_api.AffectedFiles(file_filter=file_filter):
     for line_num, line in f.ChangedContents():
       match = input_api.re.search(action_re, line)
       if match:
-        # Loads contents in tools/metrics/actions/actions.xml to memory. It's
-        # loaded only once.
-        if not current_actions:
-          with open('tools/metrics/actions/actions.xml') as actions_f:
-            current_actions = actions_f.read()
-        # Search for the matched user action name in |current_actions|.
         for action_name in match.groups():
-          action = 'name="{0}"'.format(action_name)
-          if action not in current_actions:
+          name_pattern = r'\t%s\n' % action_name
+          if name_pattern not in current_actions:
             return [output_api.PresubmitPromptWarning(
               'File %s line %d: %s is missing in '
-              'tools/metrics/actions/actions.xml. Please run '
-              'tools/metrics/actions/extract_actions.py to update.'
+              'tools/metrics/actions/chromeactions.txt. Please run '
+              'tools/metrics/actions/extract_actions.py --hash to update.'
               % (f.LocalPath(), line_num, action_name))]
   return []
 

tools/metrics/actions/OWNERS

@@ -0,0 +1,2 @@
+# per-file rules:
+per-file chromeactions.txt=*