Allow widevinecdmadapter to be built in Chromium

media/media_cdm.gypi

Index: media/media_cdm.gypi
diff --git a/media/media_cdm.gypi b/media/media_cdm.gypi
index 7d927324ac31de75805f8d3fc56c59e0947fa06c..311ced75ec1cf641b0f2aec686918d283f41c3a4 100644
--- a/media/media_cdm.gypi
+++ b/media/media_cdm.gypi
@@ -153,6 +153,32 @@
             }],
           ],
         },
+        {
+          # GN version: //media/cdm/ppapi:stubcdm (TODO!!!)
+          'target_name': 'stubcdm',
+          'type': 'none',
+          'conditions': [
+            ['os_posix == 1 and OS != "mac"', {
+              'type': 'loadable_module',
+            }],
+            ['OS == "mac" or OS == "win"', {
+              'type': 'shared_library',
+            }],
+            ['OS == "mac"', {
+              'xcode_settings': {
+                'DYLIB_INSTALL_NAME_BASE': '@loader_path',
+              },
+            }]
+          ],
+          'defines': ['CDM_IMPLEMENTATION'],
+          'dependencies': [
+            '<(DEPTH)/base/base.gyp:base',
+          ],
+          'sources': [
+            'cdm/ppapi/stub/stub_cdm.cc',
+            'cdm/ppapi/stub/stub_cdm.h',
+          ],
+        },
       ],
     }],
   ],