Checking structure sizes before reading them from memory to avoid overflowing the buffer's stream.

include/core/SkRegion.h

Index: include/core/SkRegion.h
diff --git a/include/core/SkRegion.h b/include/core/SkRegion.h
index a088d546200be5211aff976fddc2118a1b392af1..b064532c7ffba5f7296ec3f6d819eba07b735e55 100644
--- a/include/core/SkRegion.h
+++ b/include/core/SkRegion.h
@@ -367,7 +367,7 @@ public:
      *  Initialized the region from the buffer, returning the number
      *  of bytes actually read.
      */
-    uint32_t readFromMemory(const void* buffer);
+    uint32_t readFromMemory(const void* buffer, uint32_t length);
 
     /**
      *  Returns a reference to a global empty region. Just a convenience for