check of fScaledBitmap failed to lock

src/core/SkBitmapProcState.cpp

Index: src/core/SkBitmapProcState.cpp
diff --git a/src/core/SkBitmapProcState.cpp b/src/core/SkBitmapProcState.cpp
index 69af8b9061a4d5e820cdb6e0a677ba06336ade9a..db446a2445a50668ad4524894efbdd33c435d7a4 100644
--- a/src/core/SkBitmapProcState.cpp
+++ b/src/core/SkBitmapProcState.cpp
@@ -159,6 +159,12 @@ bool SkBitmapProcState::possiblyScaleImage() {
                                                             fScaledBitmap);
         }
         fScaledBitmap.lockPixels(); // wonder if Resize() should have locked this
+        if (!fScaledBitmap.getPixels()) {
+            // TODO: find out how this can happen, and add a unittest to exercise
+            // inspired by BUG=chromium:295895
+            return false;
+        }
+
         fBitmap = &fScaledBitmap;
 
         // set the inv matrix type to translate-only;