Fix finding chrome binary for ChromeDriver.

chrome/test/chromedriver/run_all_tests.py

Index: chrome/test/chromedriver/run_all_tests.py
diff --git a/chrome/test/chromedriver/run_all_tests.py b/chrome/test/chromedriver/run_all_tests.py
index e9717c593e4a4e4da36def7cc28417bd8e41dcce..5a8b95b90a3505d2bc6155c14ea2bef7b70a8e46 100755
--- a/chrome/test/chromedriver/run_all_tests.py
+++ b/chrome/test/chromedriver/run_all_tests.py
@@ -14,6 +14,31 @@ sys.path.insert(0, os.path.join(_THIS_DIR, os.pardir, 'pylib'))
 from common import chrome_paths
 from common import util
 
+def _AppendEnvironmentPath(env_name, path):
+  if env_name in os.environ:
+    lib_path = os.environ[env_name]
+    if path not in lib_path:
+      os.environ[env_name] += os.pathsep + path
+  else:
+    os.environ[env_name] = path
+
+def _FindChromeBinary(path):
+  if util.IsLinux():
+    exes = ['chrome']
+  elif util.IsMac():
+    exes = [
+      'Google Chrome.app/Contents/MacOS/Google Chrome',
+      'Chromium.app/Contents/MacOS/Chromium'
+    ]
+  elif util.IsWindows():
+    exes = ['chrome.exe']
+  else:
+    exes = []
+  for exe in exes:
+    binary = os.path.join(path, exe)
+    if os.path.exists(binary):
+      return binary
+  return None
 
 def Main():
   print '@@@BUILD_STEP chromedriver2_tests@@@'
@@ -29,6 +54,17 @@ def Main():
     os.path.join(_THIS_DIR, 'test.py'),
     os.path.join(build_dir, chromedriver),
   ]
+  # Set the built chrome binary.
+  chrome_binary = _FindChromeBinary(build_dir)
+  if chrome_binary is not None:
+    cmd.append(chrome_binary)
+  if util.IsLinux():
+    # Set LD_LIBRARY_PATH to enable successful loading of shared object files,
+    # when chromedriver2.so is not a static build.
+    _AppendEnvironmentPath('LD_LIBRARY_PATH', os.path.join(build_dir, 'lib'))
+  elif util.IsMac():
+    # In Mac, chromedriver2.so is a 32-bit build, so run with the 32-bit python.
+    os.environ['VERSIONER_PYTHON_PREFER_32_BIT'] = 'yes'
   code = util.RunCommand(cmd)
   if code != 0:
     print '@@@STEP_FAILURE@@@'