Update get_free_ffmpeg_source_files.py from Chromium dist-git

There are no longer 'ffmpeg_branding == "Chromium"' conditionals, we
need to key on the absence of 'ffmpeg_branding == "Chrome"' or
'ffmpeg_branding == "ChromeOS"' conditionals instead.

get_free_ffmpeg_source_files.py

@@ -55,14 +55,19 @@ def parse_ffmpeg_gyni_file(gyni_path, arch_not_arm):
     blocks = re.findall(r"(\(.*?\))\s\{(.*?)\}", section, re.DOTALL)
     for block in blocks:
       conditions = re.findall(r"\(?\((.*?)\)", block[0])
+      inserted = False
       for condition in conditions:
-        limitations = ['is_linux', 'ffmpeg_branding == "Chromium"']
-        if all(limitation in condition for limitation in limitations):
+        if inserted:
+          break
+        limitations = ['ffmpeg_branding == "Chrome"', 'ffmpeg_branding == "ChromeOS"']
+        if ('is_linux' in condition) and not any(limitation in condition for limitation in limitations):
           if (arch_not_arm):
             if ('x64' in condition) or ('x86' in condition):
               parse_sources (block[1], output_sources, arch_not_arm)
+              inserted = True
           else:
             parse_sources (block[1], output_sources, arch_not_arm)
+            inserted = True
 
   print ' '.join(output_sources)