Fix -Wdeprecated-copy. (#205)

Bug: chromium:1213098
Change-Id: I6230c6613f01e56e98d3deda66a9543042215206

Author: pkasting

internal/pack.h

@@ -153,11 +153,8 @@ class SideMap {
     stride_ = kOrder == SideMapOrder::WidthMajor ? depth_ : width_;
   }
 
-  SideMap(const SideMap& other)
-      : data_(other.data_),
-        width_(other.width_),
-        depth_(other.depth_),
-        stride_(other.stride_) {}
+  SideMap(const SideMap& other) = default;
+  SideMap& operator=(const SideMap& other) = default;
 
   int width() const { return width_; }
   int depth() const { return depth_; }

public/map.h

@@ -93,7 +93,8 @@ class VectorMap {
  public:
   VectorMap() : data_(nullptr), size_(0) {}
   VectorMap(Scalar* data, int size) : data_(data), size_(size) {}
-  VectorMap(const VectorMap& other) : data_(other.data_), size_(other.size_) {}
+  VectorMap(const VectorMap& other) = default;
+  VectorMap& operator=(const VectorMap& other) = default;
 
   int size() const { return size_; }
   Scalar* data() const { return data_; }