DevTools: fix presubmit hooks for windows

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

Index: third_party/WebKit/Source/devtools/scripts/compile_frontend.py
diff --git a/third_party/WebKit/Source/devtools/scripts/compile_frontend.py b/third_party/WebKit/Source/devtools/scripts/compile_frontend.py
index afc56679eec363850e892b14eb82d0959119b04a..911570de6a138541443c588f1830dc94f8edcfa9 100755
--- a/third_party/WebKit/Source/devtools/scripts/compile_frontend.py
+++ b/third_party/WebKit/Source/devtools/scripts/compile_frontend.py
@@ -38,6 +38,8 @@ import tempfile
 from build import modular_build
 from build import generate_protocol_externs
 
+import utils
+
 try:
     import simplejson as json
 except ImportError:
@@ -97,24 +99,6 @@ errors_found = False
 generate_protocol_externs.generate_protocol_externs(protocol_externs_file, path.join(inspector_path, 'browser_protocol.json'), path.join(v8_inspector_path, 'js_protocol.json'))
 
 
-# Based on http://stackoverflow.com/questions/377017/test-if-executable-exists-in-python.
-def which(program):
-    def is_exe(fpath):
-        return path.isfile(fpath) and os.access(fpath, os.X_OK)
-
-    fpath, fname = path.split(program)
-    if fpath:
-        if is_exe(program):
-            return program
-    else:
-        for part in os.environ["PATH"].split(os.pathsep):
-            part = part.strip('"')
-            exe_file = path.join(part, program)
-            if is_exe(exe_file):
-                return exe_file
-    return None
-
-
 def log_error(message):
     print 'ERROR: ' + message
 
@@ -207,9 +191,7 @@ def find_java():
     required_minor = 7
     exec_command = None
     has_server_jvm = True
-    java_path = which('java')
-    if not java_path:
-        java_path = which('java.exe')
+    java_path = utils.which('java')
 
     if not java_path:
         print 'NOTE: No Java executable found in $PATH.'