Bug 1450839 - Allow running generate-wrappers from any cwd. - r=kvark

MozReview-Commit-ID: JGpNmE9OQdC

dom/canvas/test/webgl-conf/generate-wrappers-and-manifest.py

@@ -531,8 +531,7 @@ def GetFilePathListForDir(baseDir):
 
 if __name__ == '__main__':
     file_dir = Path(__file__).parent
-    cwd = Path.cwd()
-    assert cwd.samefile(file_dir), 'Run this file from its directory.'
+    os.chdir(file_dir)
 
     testEntryList = GetTestList()
     wrapperPathStrList = WriteWrappers(testEntryList)