Revert https://codereview.chromium.org/1291903002 (protobuf roll).

third_party/protobuf/src/google/protobuf/repeated_field.cc

Index: third_party/protobuf/src/google/protobuf/repeated_field.cc
diff --git a/third_party/protobuf/src/google/protobuf/repeated_field.cc b/third_party/protobuf/src/google/protobuf/repeated_field.cc
index e5aedadc83f8150a73e92115188048e1261e5be9..2c1f74c58a40e226ab1763f8637bd7e341e4af37 100644
--- a/third_party/protobuf/src/google/protobuf/repeated_field.cc
+++ b/third_party/protobuf/src/google/protobuf/repeated_field.cc
@@ -1,6 +1,6 @@
 // Protocol Buffers - Google's data interchange format
 // Copyright 2008 Google Inc.  All rights reserved.
-// https://developers.google.com/protocol-buffers/
+// http://code.google.com/p/protobuf/
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
@@ -42,52 +42,42 @@ namespace protobuf {
 
 namespace internal {
 
-void** RepeatedPtrFieldBase::InternalExtend(int extend_amount) {
-  int new_size = current_size_ + extend_amount;
-  if (total_size_ >= new_size) {
-    // N.B.: rep_ is non-NULL because extend_amount is always > 0, hence
-    // total_size must be non-zero since it is lower-bounded by new_size.
-    return &rep_->elements[current_size_];
-  }
-  Rep* old_rep = rep_;
-  Arena* arena = GetArenaNoVirtual();
-  new_size = max(kMinRepeatedFieldAllocationSize,
-                 max(total_size_ * 2, new_size));
-  if (arena == NULL) {
-    rep_ = reinterpret_cast<Rep*>(
-        new char[kRepHeaderSize + sizeof(old_rep->elements[0])*new_size]);
-  } else {
-    rep_ = reinterpret_cast<Rep*>(
-        ::google::protobuf::Arena::CreateArray<char>(arena,
-            kRepHeaderSize + sizeof(old_rep->elements[0])*new_size));
-  }
-  total_size_ = new_size;
-  if (old_rep && old_rep->allocated_size > 0) {
-    memcpy(rep_->elements, old_rep->elements,
-           old_rep->allocated_size * sizeof(rep_->elements[0]));
-    rep_->allocated_size = old_rep->allocated_size;
-  } else {
-    rep_->allocated_size = 0;
-  }
-  if (arena == NULL) {
-    delete [] reinterpret_cast<char*>(old_rep);
+void RepeatedPtrFieldBase::Reserve(int new_size) {
+  if (total_size_ >= new_size) return;
+
+  void** old_elements = elements_;
+  total_size_ = max(kMinRepeatedFieldAllocationSize,
+                    max(total_size_ * 2, new_size));
+  elements_ = new void*[total_size_];
+  if (old_elements != NULL) {
+    memcpy(elements_, old_elements, allocated_size_ * sizeof(elements_[0]));
+    delete [] old_elements;
   }
-  return &rep_->elements[current_size_];
 }
 
-void RepeatedPtrFieldBase::Reserve(int new_size) {
-  if (new_size > current_size_) {
-    InternalExtend(new_size - current_size_);
-  }
+void RepeatedPtrFieldBase::Swap(RepeatedPtrFieldBase* other) {
+  if (this == other) return;
+  void** swap_elements       = elements_;
+  int    swap_current_size   = current_size_;
+  int    swap_allocated_size = allocated_size_;
+  int    swap_total_size     = total_size_;
+
+  elements_       = other->elements_;
+  current_size_   = other->current_size_;
+  allocated_size_ = other->allocated_size_;
+  total_size_     = other->total_size_;
+
+  other->elements_       = swap_elements;
+  other->current_size_   = swap_current_size;
+  other->allocated_size_ = swap_allocated_size;
+  other->total_size_     = swap_total_size;
 }
 
-void RepeatedPtrFieldBase::CloseGap(int start, int num) {
-  if (rep_ == NULL) return;
-  // Close up a gap of "num" elements starting at offset "start".
-  for (int i = start + num; i < rep_->allocated_size; ++i)
-    rep_->elements[i - num] = rep_->elements[i];
-  current_size_ -= num;
-  rep_->allocated_size -= num;
+string* StringTypeHandlerBase::New() {
+  return new string;
+}
+void StringTypeHandlerBase::Delete(string* value) {
+  delete value;
 }
 
 }  // namespace internal