Revert "Issue #2301 - Make Gecko Media Plugins optional when not building EME or WebRTC"

This reverts commit 9e7d1492e6.

dom/media/webaudio/MediaBufferDecoder.cpp

@@ -24,9 +24,7 @@
 #include "WebAudioUtils.h"
 #include "mozilla/dom/Promise.h"
 #include "nsPrintfCString.h"
-#ifdef MOZ_GMP
 #include "GMPService.h"
-#endif
 
 namespace mozilla {
 
@@ -182,7 +180,6 @@ MediaDecodeTask::Run()
   return NS_OK;
 }
 
-#ifdef MOZ_GMP
 class BufferDecoderGMPCrashHelper : public GMPCrashHelper
 {
 public:
@@ -200,7 +197,6 @@ public:
 private:
   nsWeakPtr mParent;
 };
-#endif
 
 bool
 MediaDecodeTask::CreateReader()
@@ -219,12 +215,8 @@ MediaDecodeTask::CreateReader()
                             mLength, principal, mContentType);
 
   MOZ_ASSERT(!mBufferDecoder);
-#ifdef MOZ_GMP
   mBufferDecoder = new BufferDecoder(resource,
     new BufferDecoderGMPCrashHelper(mDecodeJob.mContext->GetParentObject()));
-#else
-    mBufferDecoder = new BufferDecoder(resource);
-#endif
 
   // If you change this list to add support for new decoders, please consider
   // updating HTMLMediaElement::CreateDecoder as well.