Put CJBig2_SymbolDict's images in a CJBig2_List container.

core/src/fxcodec/jbig2/JBig2_List.h

Index: core/src/fxcodec/jbig2/JBig2_List.h
diff --git a/core/src/fxcodec/jbig2/JBig2_List.h b/core/src/fxcodec/jbig2/JBig2_List.h
index e033eb23ea4d7b4a9d5ba674f382799f95bf3c75..ffdd22c3ca7bc0659ca2983fc235eae0d3f25fe1 100644
--- a/core/src/fxcodec/jbig2/JBig2_List.h
+++ b/core/src/fxcodec/jbig2/JBig2_List.h
@@ -4,11 +4,13 @@
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
-#ifndef _JBIG2_LIST_H_
-#define _JBIG2_LIST_H_
+#ifndef CORE_SRC_FXCODEC_JBIG2_JBIG2_LIST_H_
+#define CORE_SRC_FXCODEC_JBIG2_JBIG2_LIST_H_
 
 #include <vector>
 
+// A poor man's ScopedVector for pointers of TYPE.
+// Owns all the pointers contained within and deletes them on destruction.
 template <class TYPE>
 class CJBig2_List {
  public:
@@ -18,23 +20,28 @@ class CJBig2_List {
     clear();
   }
 
+  TYPE* get(size_t index) const { return m_vector[index]; }
+  TYPE* back() const { return m_vector.back(); }
+  size_t size() const { return m_vector.size(); }
+
+  // Deletes all the pointers contained within.
   void clear() {
     for (size_t i = 0; i < m_vector.size(); ++i)
       delete m_vector[i];
     m_vector.clear();
   }
 
+  // Takes ownership of |pItem|.
   void push_back(TYPE* pItem) { m_vector.push_back(pItem); }
 
-  size_t size() const { return m_vector.size(); }
-  void resize(size_t count) { m_vector.resize(count); }
-
-  TYPE* get(size_t index) { return m_vector[index]; }
-
-  TYPE* back() { return m_vector.back(); }
+  void resize(size_t count) {
+    for (size_t i = count; i < size(); ++i)
+      delete m_vector[i];
+    m_vector.resize(count);
+  }
 
  private:
   std::vector<TYPE*> m_vector;
 };
 
-#endif
+#endif  // CORE_SRC_FXCODEC_JBIG2_JBIG2_LIST_H_