Bug 900248. Don't assume success for effect creation. r=Bas

gfx/layers/Effects.h

@@ -229,7 +229,8 @@ CreateTexturedEffect(gfx::SurfaceFormat aFormat,
     result = new EffectYCbCr(aSource, aFilter);
     break;
   default:
-    MOZ_CRASH("unhandled program type");
+    NS_WARNING("unhandled program type");
+    break;
   }
 
   return result;

gfx/layers/composite/ContentHost.cpp

@@ -91,6 +91,9 @@ ContentHostBase::Composite(EffectChain& aEffectChain,
 
   RefPtr<TexturedEffect> effect =
     CreateTexturedEffect(mDeprecatedTextureHost, mDeprecatedTextureHostOnWhite, aFilter);
+  if (!effect) {
+    return;
+  }
 
   aEffectChain.mPrimaryEffect = effect;
 

gfx/layers/composite/ImageHost.cpp

@@ -86,6 +86,10 @@ ImageHost::Composite(EffectChain& aEffectChain,
   RefPtr<TexturedEffect> effect = CreateTexturedEffect(mFrontBuffer->GetFormat(),
                                                        source,
                                                        aFilter);
+  if (!effect) {
+    return;
+  }
+
   aEffectChain.mPrimaryEffect = effect;
   IntSize textureSize = source->GetSize();
   gfx::Rect gfxPictureRect
@@ -288,6 +292,9 @@ DeprecatedImageHostSingle::Composite(EffectChain& aEffectChain,
 
   RefPtr<TexturedEffect> effect =
     CreateTexturedEffect(mDeprecatedTextureHost, aFilter);
+  if (!effect) {
+    return;
+  }
 
   aEffectChain.mPrimaryEffect = effect;
 

gfx/layers/composite/TiledContentHost.cpp

@@ -184,6 +184,10 @@ TiledContentHost::RenderTile(const TiledTexture& aTile,
 
   RefPtr<TexturedEffect> effect =
     CreateTexturedEffect(aTile.mDeprecatedTextureHost, aFilter);
+  if (!effect) {
+    return;
+  }
+
   if (aTile.mDeprecatedTextureHost->Lock()) {
     aEffectChain.mPrimaryEffect = effect;
   } else {