Remove some useless calls to the CFX_XMLNode ctor from subclasses.

Also fix some nits:
- Make member variable names consistent.
- Make member variables const.
- Make trivial getters return const-ref.

Change-Id: Ibd34c9bc58ec0eed3edfc3a8ea39b533a41cad73
Reviewed-on: https://pdfium-review.googlesource.com/c/44151
Reviewed-by: Ryan Harrison <rharrison@chromium.org>
Commit-Queue: Ryan Harrison <rharrison@chromium.org>

6 files changed, 15 insertions, 17 deletions

diff --git a/core/fxcrt/xml/cfx_xmlelement.cpp b/core/fxcrt/xml/cfx_xmlelement.cpp
index 434b474df7..87e50f4703 100644
--- a/core/fxcrt/xml/cfx_xmlelement.cpp
+++ b/core/fxcrt/xml/cfx_xmlelement.cpp
@@ -14,8 +14,7 @@
 #include "core/fxcrt/xml/cfx_xmldocument.h"
 #include "core/fxcrt/xml/cfx_xmltext.h"
 
-CFX_XMLElement::CFX_XMLElement(const WideString& wsTag)
-    : CFX_XMLNode(), name_(wsTag) {
+CFX_XMLElement::CFX_XMLElement(const WideString& wsTag) : name_(wsTag) {
   ASSERT(!name_.IsEmpty());
 }
 
diff --git a/core/fxcrt/xml/cfx_xmlelement.h b/core/fxcrt/xml/cfx_xmlelement.h
index 8a8720fa83..822f5ec132 100644
--- a/core/fxcrt/xml/cfx_xmlelement.h
+++ b/core/fxcrt/xml/cfx_xmlelement.h
@@ -24,7 +24,7 @@ class CFX_XMLElement final : public CFX_XMLNode {
   CFX_XMLNode* Clone(CFX_XMLDocument* doc) override;
   void Save(const RetainPtr<IFX_SeekableWriteStream>& pXMLStream) override;
 
-  WideString GetName() const { return name_; }
+  const WideString& GetName() const { return name_; }
 
   const std::map<WideString, WideString>& GetAttributes() const {
     return attrs_;
@@ -48,7 +48,7 @@ class CFX_XMLElement final : public CFX_XMLNode {
  private:
   WideString AttributeToString(const WideString& name, const WideString& value);
 
-  WideString name_;
+  const WideString name_;
   std::map<WideString, WideString> attrs_;
 };
 
diff --git a/core/fxcrt/xml/cfx_xmlinstruction.cpp b/core/fxcrt/xml/cfx_xmlinstruction.cpp
index e0af2d1c95..fb534e3732 100644
--- a/core/fxcrt/xml/cfx_xmlinstruction.cpp
+++ b/core/fxcrt/xml/cfx_xmlinstruction.cpp
@@ -13,7 +13,7 @@
 #include "core/fxcrt/xml/cfx_xmldocument.h"
 
 CFX_XMLInstruction::CFX_XMLInstruction(const WideString& wsTarget)
-    : CFX_XMLNode(), name_(wsTarget) {}
+    : name_(wsTarget) {}
 
 CFX_XMLInstruction::~CFX_XMLInstruction() = default;
 
@@ -23,12 +23,12 @@ FX_XMLNODETYPE CFX_XMLInstruction::GetType() const {
 
 CFX_XMLNode* CFX_XMLInstruction::Clone(CFX_XMLDocument* doc) {
   auto* node = doc->CreateNode<CFX_XMLInstruction>(name_);
-  node->m_TargetData = m_TargetData;
+  node->target_data_ = target_data_;
   return node;
 }
 
 void CFX_XMLInstruction::AppendData(const WideString& wsData) {
-  m_TargetData.push_back(wsData);
+  target_data_.push_back(wsData);
 }
 
 bool CFX_XMLInstruction::IsOriginalXFAVersion() const {
@@ -50,7 +50,7 @@ void CFX_XMLInstruction::Save(
   pXMLStream->WriteString(name_.UTF8Encode().AsStringView());
   pXMLStream->WriteString(" ");
 
-  for (const WideString& target : m_TargetData) {
+  for (const WideString& target : target_data_) {
     pXMLStream->WriteString(target.UTF8Encode().AsStringView());
     pXMLStream->WriteString(" ");
   }
diff --git a/core/fxcrt/xml/cfx_xmlinstruction.h b/core/fxcrt/xml/cfx_xmlinstruction.h
index c6096a7c46..6221da14d4 100644
--- a/core/fxcrt/xml/cfx_xmlinstruction.h
+++ b/core/fxcrt/xml/cfx_xmlinstruction.h
@@ -27,12 +27,12 @@ class CFX_XMLInstruction final : public CFX_XMLNode {
   bool IsOriginalXFAVersion() const;
   bool IsAcrobat() const;
 
-  const std::vector<WideString>& GetTargetData() const { return m_TargetData; }
+  const std::vector<WideString>& GetTargetData() const { return target_data_; }
   void AppendData(const WideString& wsData);
 
  private:
-  WideString name_;
-  std::vector<WideString> m_TargetData;
+  const WideString name_;
+  std::vector<WideString> target_data_;
 };
 
 inline CFX_XMLInstruction* ToXMLInstruction(CFX_XMLNode* pNode) {
diff --git a/core/fxcrt/xml/cfx_xmltext.cpp b/core/fxcrt/xml/cfx_xmltext.cpp
index c835680580..b6c1be7b07 100644
--- a/core/fxcrt/xml/cfx_xmltext.cpp
+++ b/core/fxcrt/xml/cfx_xmltext.cpp
@@ -8,8 +8,7 @@
 
 #include "core/fxcrt/xml/cfx_xmldocument.h"
 
-CFX_XMLText::CFX_XMLText(const WideString& wsText)
-    : CFX_XMLNode(), m_wsText(wsText) {}
+CFX_XMLText::CFX_XMLText(const WideString& wsText) : text_(wsText) {}
 
 CFX_XMLText::~CFX_XMLText() = default;
 
@@ -18,7 +17,7 @@ FX_XMLNODETYPE CFX_XMLText::GetType() const {
 }
 
 CFX_XMLNode* CFX_XMLText::Clone(CFX_XMLDocument* doc) {
-  return doc->CreateNode<CFX_XMLText>(m_wsText);
+  return doc->CreateNode<CFX_XMLText>(text_);
 }
 
 void CFX_XMLText::Save(const RetainPtr<IFX_SeekableWriteStream>& pXMLStream) {
diff --git a/core/fxcrt/xml/cfx_xmltext.h b/core/fxcrt/xml/cfx_xmltext.h
index 3e15c5ce9a..f2c7c88d72 100644
--- a/core/fxcrt/xml/cfx_xmltext.h
+++ b/core/fxcrt/xml/cfx_xmltext.h
@@ -22,11 +22,11 @@ class CFX_XMLText : public CFX_XMLNode {
   CFX_XMLNode* Clone(CFX_XMLDocument* doc) override;
   void Save(const RetainPtr<IFX_SeekableWriteStream>& pXMLStream) override;
 
-  WideString GetText() const { return m_wsText; }
-  void SetText(const WideString& wsText) { m_wsText = wsText; }
+  const WideString& GetText() const { return text_; }
+  void SetText(const WideString& wsText) { text_ = wsText; }
 
  private:
-  WideString m_wsText;
+  WideString text_;
 };
 
 inline bool IsXMLText(const CFX_XMLNode* pNode) {