Make code compile with clang_use_chrome_plugin (part I)

core/fpdfapi/fpdf_page/cpdf_pathobject.cpp

 // Copyright 2016 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "core/fpdfapi/fpdf_page/include/cpdf_pathobject.h"
 
 CPDF_PathObject::CPDF_PathObject() {}
 
 CPDF_PathObject::~CPDF_PathObject() {}
 
 CPDF_PathObject* CPDF_PathObject::Clone() const {
   CPDF_PathObject* obj = new CPDF_PathObject;
   obj->CopyData(this);
 
   obj->m_Path = m_Path;
   obj->m_FillType = m_FillType;
   obj->m_bStroke = m_bStroke;
   obj->m_Matrix = m_Matrix;
   return obj;
 }
 
+CPDF_PageObject::Type CPDF_PathObject::GetType() const {
+  return PATH;
+}
+
 void CPDF_PathObject::Transform(const CFX_Matrix& matrix) {
   m_Matrix.Concat(matrix);
   CalcBoundingBox();
 }
 
+bool CPDF_PathObject::IsPath() const {
+  return true;
+}
+
+CPDF_PathObject* CPDF_PathObject::AsPath() {
+  return this;
+}
+
+const CPDF_PathObject* CPDF_PathObject::AsPath() const {
+  return this;
+}
+
 void CPDF_PathObject::CalcBoundingBox() {
   if (m_Path.IsNull()) {
     return;
   }
   CFX_FloatRect rect;
   FX_FLOAT width = m_GraphState.GetObject()->m_LineWidth;
   if (m_bStroke && width != 0) {
     rect = m_Path.GetBoundingBox(width, m_GraphState.GetObject()->m_MiterLimit);
   } else {
     rect = m_Path.GetBoundingBox();
   }
   rect.Transform(&m_Matrix);
   if (width == 0 && m_bStroke) {
     rect.left += -0.5f;
     rect.right += 0.5f;
     rect.bottom += -0.5f;
     rect.top += 0.5f;
   }
   m_Left = rect.left;
   m_Right = rect.right;
   m_Top = rect.top;
   m_Bottom = rect.bottom;
 }