[inspector] add presubmit.py to compile inspector-related scripts

src/inspector/PRESUBMIT.py

Index: src/inspector/PRESUBMIT.py
diff --git a/src/inspector/PRESUBMIT.py b/src/inspector/PRESUBMIT.py
new file mode 100644
index 0000000000000000000000000000000000000000..491564b2d9fc683a70bfab3db990e882bf164229
--- /dev/null
+++ b/src/inspector/PRESUBMIT.py
@@ -0,0 +1,55 @@
+#!/usr/bin/env python
+#
+# Copyright 2016 the V8 project authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""v8_inspect presubmit script
+
+See http://dev.chromium.org/developers/how-tos/depottools/presubmit-scripts
+for more details about the presubmit API built into gcl.
+"""
+
+compile_note = "Be sure to run your patch by the compile-scripts.py script prior to committing!"
+
+
+def _CompileScripts(input_api, output_api):
+  local_paths = [f.LocalPath() for f in input_api.AffectedFiles()]
+
+  compilation_related_files = [
+    "js_protocol.json"
+    "compile-scripts.js",
+    "injected-script-source.js",
+    "debugger_script_externs.js",
+    "injected_script_externs.js",
+    "check_injected_script_source.js",
+    "debugger-script.js"
+  ]
+
+  for file in compilation_related_files:
+    if (any(file in path for path in local_paths)):
+      script_path = input_api.os_path.join(input_api.PresubmitLocalPath(),
+        "build", "compile-scripts.py")
+      proc = input_api.subprocess.Popen(
+        [input_api.python_executable, script_path],
+        stdout=input_api.subprocess.PIPE,
+        stderr=input_api.subprocess.STDOUT)
+      out, _ = proc.communicate()
+      if "ERROR" in out or "WARNING" in out or proc.returncode:
+        return [output_api.PresubmitError(out)]
+      if "NOTE" in out:
+        return [output_api.PresubmitPromptWarning(out + compile_note)]
+      return []
+  return []
+
+
+def CheckChangeOnUpload(input_api, output_api):
+  results = []
+  results.extend(_CompileScripts(input_api, output_api))
+  return results
+
+
+def CheckChangeOnCommit(input_api, output_api):
+  results = []
+  results.extend(_CompileScripts(input_api, output_api))
+  return results