Make code compile with clang_use_chrome_plugin (part II)

This change contains files in core directory which were not covered
in part I. This is part of the efforts to make PDFium code compilable
by Clang chromium style plugins.

The changes are mainly the following:
-- move inline constructor/destructor of complex class/struct out-of-line;
-- add constructor/destructor of complex class/struct if not
 explicitly defined;
-- add explicit out-of-line copy constructor when needed;
-- move inline virtual functions out-of-line;
-- Properly mark virtual functions with 'override';
-- some minor cleanups;

BUG=pdfium:469

Review-Url: https://codereview.chromium.org/2060913003

1 files changed, 7 insertions, 9 deletions

diff --git a/core/fpdfdoc/tagged_int.h b/core/fpdfdoc/tagged_int.h
index d508211441..354a93cb76 100644
--- a/core/fpdfdoc/tagged_int.h
+++ b/core/fpdfdoc/tagged_int.h
@@ -50,15 +50,13 @@ class CPDF_StructElementImpl final : public IPDF_StructElement {
                          CPDF_StructElementImpl* pParent,
                          CPDF_Dictionary* pDict);
 
-  // IPDF_StructElement:
-  IPDF_StructTree* GetTree() const override { return m_pTree; }
-  const CFX_ByteString& GetType() const override { return m_Type; }
-  IPDF_StructElement* GetParent() const override { return m_pParent; }
-  CPDF_Dictionary* GetDict() const override { return m_pDict; }
-  int CountKids() const override { return pdfium::CollectionSize<int>(m_Kids); }
-  const CPDF_StructKid& GetKid(int index) const override {
-    return m_Kids[index];
-  }
+  // IPDF_StructElement
+  IPDF_StructTree* GetTree() const override;
+  const CFX_ByteString& GetType() const override;
+  IPDF_StructElement* GetParent() const override;
+  CPDF_Dictionary* GetDict() const override;
+  int CountKids() const override;
+  const CPDF_StructKid& GetKid(int index) const override;
   CPDF_Object* GetAttr(const CFX_ByteStringC& owner,
                        const CFX_ByteStringC& name,
                        FX_BOOL bInheritable = FALSE,