catch the other case where we need to see if fScaledBitmap.lockPixels() might have failed

src/core/SkBitmapProcState.cpp

Index: src/core/SkBitmapProcState.cpp
diff --git a/src/core/SkBitmapProcState.cpp b/src/core/SkBitmapProcState.cpp
index db446a2445a50668ad4524894efbdd33c435d7a4..c50266f017328c4adfddc28502281a32b098c644 100644
--- a/src/core/SkBitmapProcState.cpp
+++ b/src/core/SkBitmapProcState.cpp
@@ -299,6 +299,11 @@ bool SkBitmapProcState::lockBaseBitmap() {
         }
     }
     fScaledBitmap.lockPixels(); // just 'cause the cache made a copy :(
+    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;
     return true;
 }