Bug 1206977: P6. Make PlatformDecoderModule::SupportsMimeType pure virtual. r=cpearce

dom/media/platforms/PlatformDecoderModule.cpp

@@ -64,12 +64,4 @@ PlatformDecoderModule::Create()
   return m.forget();
 }
 
-bool
-PlatformDecoderModule::SupportsMimeType(const nsACString& aMimeType)
-{
-  return aMimeType.EqualsLiteral("audio/mp4a-latm") ||
-    aMimeType.EqualsLiteral("video/mp4") ||
-    aMimeType.EqualsLiteral("video/avc");
-}
-
 } // namespace mozilla

dom/media/platforms/PlatformDecoderModule.h

@@ -86,7 +86,7 @@ public:
   }
 
   // Indicates if the PlatformDecoderModule supports decoding of aMimeType.
-  virtual bool SupportsMimeType(const nsACString& aMimeType);
+  virtual bool SupportsMimeType(const nsACString& aMimeType) = 0;
 
   enum ConversionRequired {
     kNeedNone,

dom/media/platforms/agnostic/eme/EMEDecoderModule.h

@@ -42,6 +42,15 @@ public:
   ConversionRequired
   DecoderNeedsConversion(const TrackInfo& aConfig) const override;
 
+  bool
+  SupportsMimeType(const nsACString& aMimeType) override
+  {
+    // TODO Properly.
+    return aMimeType.EqualsLiteral("audio/mp4a-latm") ||
+      aMimeType.EqualsLiteral("video/mp4") ||
+      aMimeType.EqualsLiteral("video/avc");
+  }
+
 private:
   nsRefPtr<CDMProxy> mProxy;
   // Will be null if CDM has decoding capability.

dom/media/platforms/agnostic/gmp/GMPDecoderModule.h

@@ -33,6 +33,14 @@ public:
 
   ConversionRequired
   DecoderNeedsConversion(const TrackInfo& aConfig) const override;
+
+  bool
+  SupportsMimeType(const nsACString& aMimeType) override
+  {
+    // TODO properly.
+    return aMimeType.EqualsLiteral("audio/mp4a-latm") ||
+      aMimeType.EqualsLiteral("video/avc");
+  }
 };
 
 } // namespace mozilla

dom/media/platforms/apple/AppleDecoderModule.cpp

@@ -110,7 +110,9 @@ bool
 AppleDecoderModule::SupportsMimeType(const nsACString& aMimeType)
 {
   return aMimeType.EqualsLiteral("audio/mpeg") ||
-    PlatformDecoderModule::SupportsMimeType(aMimeType);
+    aMimeType.EqualsLiteral("audio/mp4a-latm") ||
+    aMimeType.EqualsLiteral("video/mp4") ||
+    aMimeType.EqualsLiteral("video/avc");
 }
 
 PlatformDecoderModule::ConversionRequired