Add support for generating thunk source from IDL.

This introduces a few new IDL attributes:
  generate_thunk - Enables thunk generation for an IDL file.
  create_func - Overrides the guessed create function name.
  on_failure - Overrides the default return value on failure.
  report_errors - Allows error reporting to be disabled.

  By using these attributes, we can generate _thunk.cc files for many IDL
  files.

I'll send CLs for moving the thunks separately, as I found it tiring to
review them all in a big lump. I have PPB_Widget_Dev here as an example.

BUG=


Review URL: https://chromiumcodereview.appspot.com/11417010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@168450 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 13 insertions, 2 deletions

diff --git a/ppapi/PRESUBMIT.py b/ppapi/PRESUBMIT.py
index b350003..5fbb135 100644
--- a/ppapi/PRESUBMIT.py
+++ b/ppapi/PRESUBMIT.py
@@ -157,13 +157,24 @@ def CheckChange(input_api, output_api):
   missing = []
   for filename in idl_files:
     if filename not in set(h_files):
-      missing.append('  ppapi/c/%s.idl' % filename)
+      missing.append('ppapi/api/%s.idl' % filename)
+
+  # An IDL change that includes [generate_thunk] doesn't need to have
+  # an update to the corresponding .h file.
+  new_thunk_files = []
+  for filename in missing:
+    lines = input_api.RightHandSideLines(lambda f: f.LocalPath() == filename)
+    for line in lines:
+      if line[2].strip() == '[generate_thunk]':
+        new_thunk_files.append(filename)
+  for filename in new_thunk_files:
+    missing.remove(filename)
 
   if missing:
     results.append(
         output_api.PresubmitPromptWarning(
             'Missing PPAPI header, no change or skipped generation?',
-            long_text='\n'.join(missing)))
+            long_text='\n  '.join(missing)))
 
   missing_dev = []
   missing_stable = []