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

include/core/SkPath.h

Index: include/core/SkPath.h
diff --git a/include/core/SkPath.h b/include/core/SkPath.h
index a6674d9afb4e65cc024ee8a155d5f4f4b4869bfe..26afdf48c6e0fda9734aa843c1975e0ae9e89cae 100644
--- a/include/core/SkPath.h
+++ b/include/core/SkPath.h
@@ -910,15 +910,18 @@ public:
     void dump() const;
 
     /**
-     *  Write the region to the buffer, and return the number of bytes written.
+     *  Write the path to the buffer, and return the number of bytes written.
      *  If buffer is NULL, it still returns the number of bytes.
      */
     uint32_t writeToMemory(void* buffer) const;
     /**
-     *  Initialized the region from the buffer, returning the number
-     *  of bytes actually read.
+     * Initializes the path from the buffer
+     *
+     * @param buffer Memory to read from
+     * @param length Amount of memory available in the buffer
+     * @return number of bytes read or 0 if there was not enough memory available
      */
-    uint32_t readFromMemory(const void* buffer);
+    uint32_t readFromMemory(const void* buffer, uint32_t length);
 
 #ifdef SK_BUILD_FOR_ANDROID
     uint32_t getGenerationID() const;