Get DCHECK back to EncodedStaticFieldValueIterator

This is a follow-up of
https://android-review.googlesource.com/#/c/185000/

Change-Id: Ia7311ab948712324f92814e4d415a0a78d16bb84
diff --git a/runtime/dex_file.cc b/runtime/dex_file.cc
index 4e15e80..b1a0538 100644
--- a/runtime/dex_file.cc
+++ b/runtime/dex_file.cc
@@ -2210,22 +2210,47 @@
 EncodedStaticFieldValueIterator::EncodedStaticFieldValueIterator(
     const DexFile& dex_file,
     const DexFile::ClassDef& class_def)
-    : EncodedStaticFieldValueIterator(dex_file, nullptr, nullptr,
-                                      nullptr, class_def) {
+    : EncodedStaticFieldValueIterator(dex_file,
+                                      nullptr,
+                                      nullptr,
+                                      nullptr,
+                                      class_def,
+                                      -1,
+                                      kByte) {
 }
 
 EncodedStaticFieldValueIterator::EncodedStaticFieldValueIterator(
-    const DexFile& dex_file, Handle<mirror::DexCache>* dex_cache,
-    Handle<mirror::ClassLoader>* class_loader, ClassLinker* linker,
+    const DexFile& dex_file,
+    Handle<mirror::DexCache>* dex_cache,
+    Handle<mirror::ClassLoader>* class_loader,
+    ClassLinker* linker,
     const DexFile::ClassDef& class_def)
+    : EncodedStaticFieldValueIterator(dex_file,
+                                      dex_cache, class_loader,
+                                      linker,
+                                      class_def,
+                                      -1,
+                                      kByte) {
+  DCHECK(dex_cache_ != nullptr);
+  DCHECK(class_loader_ != nullptr);
+}
+
+EncodedStaticFieldValueIterator::EncodedStaticFieldValueIterator(
+    const DexFile& dex_file,
+    Handle<mirror::DexCache>* dex_cache,
+    Handle<mirror::ClassLoader>* class_loader,
+    ClassLinker* linker,
+    const DexFile::ClassDef& class_def,
+    size_t pos,
+    ValueType type)
     : dex_file_(dex_file),
       dex_cache_(dex_cache),
       class_loader_(class_loader),
       linker_(linker),
       array_size_(),
-      pos_(-1),
-      type_(kByte) {
-  ptr_ = dex_file_.GetEncodedStaticFieldValuesArray(class_def);
+      pos_(pos),
+      type_(type) {
+  ptr_ = dex_file.GetEncodedStaticFieldValuesArray(class_def);
   if (ptr_ == nullptr) {
     array_size_ = 0;
   } else {