Allow non-atlasable layer to still be hoisted

The PlausiblyAtlasable check was preventing large layers from ever being hoisted in the FindLayersToHoist path.

Review URL: https://codereview.chromium.org/844613002
diff --git a/src/gpu/GrLayerCache.cpp b/src/gpu/GrLayerCache.cpp
index e521b3e..8f6a69b 100644
--- a/src/gpu/GrLayerCache.cpp
+++ b/src/gpu/GrLayerCache.cpp
@@ -253,9 +253,7 @@
         usage = GrContext::kExact_ScratchTexMatch;
     }
 
-    SkAutoTUnref<GrTexture> tex(
-        fContext->refScratchTexture(desc, usage));
-
+    SkAutoTUnref<GrTexture> tex(fContext->refScratchTexture(desc, usage));
     if (!tex) {
         return false;
     }