WIP: Reduce code size of InterfacePtrState

mojo/public/cpp/bindings/interface_ptr_info.h

Index: mojo/public/cpp/bindings/interface_ptr_info.h
diff --git a/mojo/public/cpp/bindings/interface_ptr_info.h b/mojo/public/cpp/bindings/interface_ptr_info.h
index 0b2d8089c4327f7bf608c152980d882dc0626a6b..d1b42df56ce105451e757d9a5ad0905919e41319 100644
--- a/mojo/public/cpp/bindings/interface_ptr_info.h
+++ b/mojo/public/cpp/bindings/interface_ptr_info.h
@@ -15,30 +15,17 @@ namespace mojo {
 
 // InterfacePtrInfo stores necessary information to communicate with a remote
 // interface implementation, which could be used to construct an InterfacePtr.
-template <typename Interface>
-class InterfacePtrInfo {
+class InterfacePtrInfoBase {
  public:
-  InterfacePtrInfo() : version_(0u) {}
-
-  InterfacePtrInfo(ScopedMessagePipeHandle handle, uint32_t version)
-      : handle_(std::move(handle)), version_(version) {}
+  InterfacePtrInfoBase();
 
-  InterfacePtrInfo(InterfacePtrInfo&& other)
-      : handle_(std::move(other.handle_)), version_(other.version_) {
-    other.version_ = 0u;
-  }
+  InterfacePtrInfoBase(ScopedMessagePipeHandle handle, uint32_t version);
 
-  ~InterfacePtrInfo() {}
+  InterfacePtrInfoBase(InterfacePtrInfoBase&& other);
 
-  InterfacePtrInfo& operator=(InterfacePtrInfo&& other) {
-    if (this != &other) {
-      handle_ = std::move(other.handle_);
-      version_ = other.version_;
-      other.version_ = 0u;
-    }
+  ~InterfacePtrInfoBase();
 
-    return *this;
-  }
+  InterfacePtrInfoBase& operator=(InterfacePtrInfoBase&& other);
 
   bool is_valid() const { return handle_.is_valid(); }
 
@@ -55,7 +42,12 @@ class InterfacePtrInfo {
   ScopedMessagePipeHandle handle_;
   uint32_t version_;
 
-  DISALLOW_COPY_AND_ASSIGN(InterfacePtrInfo);
+  DISALLOW_COPY_AND_ASSIGN(InterfacePtrInfoBase);
+};
+
+template <typename Interface>
+class InterfacePtrInfo : public InterfacePtrInfoBase {
+  using InterfacePtrInfoBase::InterfacePtrInfoBase;
 };
 
 }  // namespace mojo