SkImageInfoValidConversion (part 2)

Disabling non-opaque -> opaque should be fine now that the
Chrome unit test has been fixed.

BUG=skia:6021

Change-Id: I39f087e2695bdefacf793bd137931e3115ec58cb
Reviewed-on: https://skia-review.googlesource.com/7121
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Matt Sarett <msarett@google.com>
diff --git a/src/core/SkImageInfoPriv.h b/src/core/SkImageInfoPriv.h
index 029aa93..72138ae 100644
--- a/src/core/SkImageInfoPriv.h
+++ b/src/core/SkImageInfoPriv.h
@@ -69,11 +69,9 @@
         return false;
     }
 
-    // FIXME (msarett): This is commented out until a fix to Chrome's gfx_unittest lands.
-    // In those tests, they write kPremul pixels to a kOpaque canvas.
-    //if (kOpaque_SkAlphaType == dst.alphaType() && kOpaque_SkAlphaType != src.alphaType()) {
-    //    return false;
-    //}
+    if (kOpaque_SkAlphaType == dst.alphaType() && kOpaque_SkAlphaType != src.alphaType()) {
+        return false;
+    }
 
     return true;
 }