Make landmines.py take an extra script via an env var.

build/landmines.py

Index: build/landmines.py
diff --git a/build/landmines.py b/build/landmines.py
index f1a514c5e7e206c345a33febea6b3d840781999e..d419b8945cebe502bc68bbacb4325925385a1f95 100755
--- a/build/landmines.py
+++ b/build/landmines.py
@@ -106,6 +106,9 @@ def main():
 
   gyp_helper.apply_chromium_gyp_env()
 
+  extra_script = os.environ.get('EXTRA_LANDMINES_SCRIPT')
+  if extra_script:
+    options.landmine_scripts.append(extra_script)

[iannucci, 2013/08/31 00:54:20]

I would put this above the apply_chromium_gyp_env. In fact, I would pull all the
argument parsing (including this) into its own function which just returns
landmine_scripts.

   for target in ('Debug', 'Release', 'Debug_x64', 'Release_x64'):
     landmines = []
     for s in options.landmine_scripts:
@@ -113,6 +116,7 @@ def main():
                               stdout=subprocess.PIPE)
       output, _ = proc.communicate()
       landmines.extend([('%s\n' % l.strip()) for l in output.splitlines()])
+
     set_up_landmines(target, landmines)
 
   return 0