Remove some CFX_ArrayTemplate in fpdfapi and fpdfdoc

core/fpdfdoc/cpdf_formfield.h

Index: core/fpdfdoc/cpdf_formfield.h
diff --git a/core/fpdfdoc/cpdf_formfield.h b/core/fpdfdoc/cpdf_formfield.h
index 37f17c3a8acae609d08b19dbd6b0540fb123d976..9a1ddc4599732e0690ec9f50b05e6ecf3823a908 100644
--- a/core/fpdfdoc/cpdf_formfield.h
+++ b/core/fpdfdoc/cpdf_formfield.h
@@ -7,11 +7,14 @@
 #ifndef CORE_FPDFDOC_CPDF_FORMFIELD_H_
 #define CORE_FPDFDOC_CPDF_FORMFIELD_H_
 
+#include <vector>
+
 #include "core/fpdfdoc/cpdf_aaction.h"
 #include "core/fpdfdoc/cpdf_formfield.h"
 #include "core/fxcrt/fx_basic.h"
 #include "core/fxcrt/fx_string.h"
 #include "core/fxcrt/fx_system.h"
+#include "third_party/base/stl_util.h"
 
 #define FIELDTYPE_UNKNOWN 0
 #define FIELDTYPE_PUSHBUTTON 1
@@ -58,12 +61,12 @@ class CPDF_FormField {
 
   bool ResetField(bool bNotify = false);
 
-  int CountControls() const { return m_ControlList.GetSize(); }
-
-  CPDF_FormControl* GetControl(int index) const {
-    return m_ControlList.GetAt(index);
+  int CountControls() const {
+    return pdfium::CollectionSize<int>(m_ControlList);
   }
 
+  CPDF_FormControl* GetControl(int index) const { return m_ControlList[index]; }
+
   int GetControlIndex(const CPDF_FormControl* pControl) const;
   int GetFieldType() const;
 
@@ -150,9 +153,9 @@ class CPDF_FormField {
 
   CPDF_FormField::Type m_Type;
   uint32_t m_Flags;
-  CPDF_InterForm* m_pForm;
+  CPDF_InterForm* const m_pForm;
   CPDF_Dictionary* m_pDict;
-  CFX_ArrayTemplate<CPDF_FormControl*> m_ControlList;
+  std::vector<CPDF_FormControl*> m_ControlList;  // Owned by InterForm parent.
   FX_FLOAT m_FontSize;
   CPDF_Font* m_pFont;
 };