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, 1 insertions, 6 deletions

diff --git a/core/fpdfapi/fpdf_render/cpdf_pagerendercache.h b/core/fpdfapi/fpdf_render/cpdf_pagerendercache.h
index df0d73ac64..d68856b12b 100644
--- a/core/fpdfapi/fpdf_render/cpdf_pagerendercache.h
+++ b/core/fpdfapi/fpdf_render/cpdf_pagerendercache.h
@@ -21,12 +21,7 @@ class IFX_Pause;
 
 class CPDF_PageRenderCache {
  public:
-  explicit CPDF_PageRenderCache(CPDF_Page* pPage)
-      : m_pPage(pPage),
-        m_pCurImageCacheEntry(nullptr),
-        m_nTimeCount(0),
-        m_nCacheSize(0),
-        m_bCurFindCache(FALSE) {}
+  explicit CPDF_PageRenderCache(CPDF_Page* pPage);
   ~CPDF_PageRenderCache();
 
   uint32_t EstimateSize();