Revert "Chromium changes to statically link ffmpeg."

media/cdm/ppapi/external_clear_key/clear_key_cdm.cc

Index: media/cdm/ppapi/external_clear_key/clear_key_cdm.cc
diff --git a/media/cdm/ppapi/external_clear_key/clear_key_cdm.cc b/media/cdm/ppapi/external_clear_key/clear_key_cdm.cc
index 6087dcc6d6b7915e028114f02754bc181c37e566..6a6ff62a548832451cafb2bdb081d396d6cc55aa 100644
--- a/media/cdm/ppapi/external_clear_key/clear_key_cdm.cc
+++ b/media/cdm/ppapi/external_clear_key/clear_key_cdm.cc
@@ -44,17 +44,25 @@ MSVC_PUSH_DISABLE_WARNING(4244);
 MSVC_POP_WARNING();
 }  // extern "C"
 
+// TODO(tomfinegan): When COMPONENT_BUILD is not defined an AtExitManager must
+// exist before the call to InitializeFFmpegLibraries(). This should no longer
+// be required after http://crbug.com/91970 because we'll be able to get rid of
+// InitializeFFmpegLibraries().
 #if !defined COMPONENT_BUILD
 static base::AtExitManager g_at_exit_manager;
 #endif
 
-// Prepare media library.
+// TODO(tomfinegan): InitializeFFmpegLibraries() and |g_cdm_module_initialized|
+// are required for running in the sandbox, and should no longer be required
+// after http://crbug.com/91970 is fixed.
 static bool InitializeFFmpegLibraries() {
-  media::InitializeMediaLibrary();
+  base::FilePath file_path;
+  CHECK(PathService::Get(base::DIR_MODULE, &file_path));
+  CHECK(media::InitializeMediaLibrary(file_path));
   return true;
 }
-static bool g_ffmpeg_lib_initialized = InitializeFFmpegLibraries();
 
+static bool g_ffmpeg_lib_initialized = InitializeFFmpegLibraries();
 #endif  // CLEAR_KEY_CDM_USE_FFMPEG_DECODER
 
 const char kClearKeyCdmVersion[] = "0.1.0.1";
@@ -222,6 +230,7 @@ class ScopedResetter {
 
 void INITIALIZE_CDM_MODULE() {
 #if defined(CLEAR_KEY_CDM_USE_FFMPEG_DECODER)
+  DVLOG(2) << "FFmpeg libraries initialized: " << g_ffmpeg_lib_initialized;
   av_register_all();
 #endif  // CLEAR_KEY_CDM_USE_FFMPEG_DECODER
 }