landmines: use CHROMIUM_OUT_DIR if set

R=skyostil@chromium.org
BUG=404591

Review URL: https://codereview.chromium.org/464263005

git-svn-id: http://src.chromium.org/svn/trunk/src/build@290354 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

landmines.py

@@ -43,7 +43,7 @@ def get_build_dir(build_tool, is_iphone=False):
   if build_tool == 'xcode':
     ret = os.path.join(SRC_DIR, 'xcodebuild')
   elif build_tool in ['make', 'ninja', 'ninja-ios']:  # TODO: Remove ninja-ios.
-    ret = os.path.join(SRC_DIR, 'out')
+    ret = os.path.join(SRC_DIR, os.environ.get('CHROMIUM_OUT_DIR', 'out'))
   elif build_tool in ['msvs', 'vs', 'ib']:
     ret = os.path.join(SRC_DIR, 'build')
   else: