Issue #80 - De-unify dom/media part 1

This de-unifies up to and including dom/media/platforms with the exception of
dom/media/platforms/wmf, because that one throws weird errors in the Win
SDK which don't have a clear cause (yet)

dom/media/platforms/ffmpeg/FFmpegVideoDecoder.cpp

@@ -16,6 +16,7 @@
 #include "FFmpegVideoDecoder.h"
 #include "FFmpegLog.h"
 #include "mozilla/PodOperations.h"
+#include "prsystem.h" // for PR_GetNumberOfProcessors
 
 #include "libavutil/pixfmt.h"
 #if LIBAVCODEC_VERSION_MAJOR < 54

dom/media/platforms/ffmpeg/ffmpeg57/moz.build

@@ -4,7 +4,7 @@
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-UNIFIED_SOURCES += [
+SOURCES += [
     '../FFmpegAudioDecoder.cpp',
     '../FFmpegDataDecoder.cpp',
     '../FFmpegDecoderModule.cpp',

dom/media/platforms/ffmpeg/ffmpeg58/moz.build

@@ -4,7 +4,7 @@
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-UNIFIED_SOURCES += [
+SOURCES += [
     '../FFmpegAudioDecoder.cpp',
     '../FFmpegDataDecoder.cpp',
     '../FFmpegDecoderModule.cpp',

dom/media/platforms/ffmpeg/ffvpx/moz.build

@@ -9,7 +9,7 @@ EXPORTS += [
     'FFVPXRuntimeLinker.h',
 ]
 
-UNIFIED_SOURCES += [
+SOURCES += [
     '../FFmpegAudioDecoder.cpp',
     '../FFmpegDataDecoder.cpp',
     '../FFmpegDecoderModule.cpp',

dom/media/platforms/ffmpeg/libav53/moz.build

@@ -4,7 +4,7 @@
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-UNIFIED_SOURCES += [
+SOURCES += [
     '../FFmpegAudioDecoder.cpp',
     '../FFmpegDataDecoder.cpp',
     '../FFmpegDecoderModule.cpp',

dom/media/platforms/ffmpeg/libav54/moz.build

@@ -4,7 +4,7 @@
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-UNIFIED_SOURCES += [
+SOURCES += [
     '../FFmpegAudioDecoder.cpp',
     '../FFmpegDataDecoder.cpp',
     '../FFmpegDecoderModule.cpp',

dom/media/platforms/ffmpeg/libav55/moz.build

@@ -4,7 +4,7 @@
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-UNIFIED_SOURCES += [
+SOURCES += [
     '../FFmpegAudioDecoder.cpp',
     '../FFmpegDataDecoder.cpp',
     '../FFmpegDecoderModule.cpp',

dom/media/platforms/ffmpeg/moz.build

@@ -16,7 +16,7 @@ DIRS += [
     'ffmpeg58',
 ]
 
-UNIFIED_SOURCES += [
+SOURCES += [
     'FFmpegRuntimeLinker.cpp',
 ]