DevTools: fix presubmit hooks for windows

third_party/WebKit/Source/devtools/scripts/utils.py

Index: third_party/WebKit/Source/devtools/scripts/utils.py
diff --git a/third_party/WebKit/Source/devtools/scripts/utils.py b/third_party/WebKit/Source/devtools/scripts/utils.py
new file mode 100644
index 0000000000000000000000000000000000000000..4ff392ba194c85a741c99830598f571bf61c17e6
--- /dev/null
+++ b/third_party/WebKit/Source/devtools/scripts/utils.py
@@ -0,0 +1,42 @@
+# Copyright 2016 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import os
+from os import path
+import sys
+
+
+# Based on http://stackoverflow.com/questions/377017/test-if-executable-exists-in-python.
+def which(program):
+    def is_executable(fpath):
+        return path.isfile(fpath) and os.access(fpath, os.X_OK)
+
+    fpath, fname = path.split(program)
+    if fpath:
+        if is_executable(program):
+            return program
+        return None
+    env_paths = os.environ["PATH"].split(os.pathsep)
+    if sys.platform == "win32":
+        env_paths = get_windows_path(env_paths)
+    for part in env_paths:
+        part = part.strip('\"')
+        file = path.join(part, program)
+        if is_executable(file):
+            return file
+        if sys.platform == "win32" and not file.endswith(".exe"):
+            file_exe = file + ".exe"
+            if is_executable(file_exe):
+                return file_exe
+    return None
+
+
+# Use to find 64-bit programs (e.g. Java) when using 32-bit python in Windows
+def get_windows_path(env_paths):
+    new_env_paths = env_paths[:]
+    for env_path in env_paths:
+        env_path = env_path.lower()
+        if "system32" in env_path:
+            new_env_paths.append(env_path.replace("system32", "sysnative"))
+    return new_env_paths