Make code compile with clang_use_chrome_plugin (part I)

This change contains files in core/fpdfapi directory. 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/2060973002

1 files changed, 16 insertions, 0 deletions

diff --git a/core/fpdfapi/fpdf_page/cpdf_pagemodule.cpp b/core/fpdfapi/fpdf_page/cpdf_pagemodule.cpp
index 0d2f547835..c22c8fbc46 100644
--- a/core/fpdfapi/fpdf_page/cpdf_pagemodule.cpp
+++ b/core/fpdfapi/fpdf_page/cpdf_pagemodule.cpp
@@ -6,6 +6,18 @@
 
 #include "core/fpdfapi/fpdf_page/cpdf_pagemodule.h"
 
+CPDF_PageModule::CPDF_PageModule()
+    : m_StockGrayCS(nullptr, PDFCS_DEVICEGRAY),
+      m_StockRGBCS(nullptr, PDFCS_DEVICERGB),
+      m_StockCMYKCS(nullptr, PDFCS_DEVICECMYK),
+      m_StockPatternCS(nullptr) {}
+
+CPDF_PageModule::~CPDF_PageModule() {}
+
+CPDF_FontGlobals* CPDF_PageModule::GetFontGlobals() {
+  return &m_FontGlobals;
+}
+
 CPDF_ColorSpace* CPDF_PageModule::GetStockCS(int family) {
   if (family == PDFCS_DEVICEGRAY)
     return &m_StockGrayCS;
@@ -17,3 +29,7 @@ CPDF_ColorSpace* CPDF_PageModule::GetStockCS(int family) {
     return &m_StockPatternCS;
   return nullptr;
 }
+
+void CPDF_PageModule::ClearStockFont(CPDF_Document* pDoc) {
+  m_FontGlobals.Clear(pDoc);
+}