Add a Retained Pointer smart class.

pdfium.gyp

Index: pdfium.gyp
diff --git a/pdfium.gyp b/pdfium.gyp
index 0fb4c3eae507e992522b577aa37070b3066bde3c..e61237fafa51752bd16824654edc38d80b7b2646 100644
--- a/pdfium.gyp
+++ b/pdfium.gyp
@@ -593,13 +593,6 @@
       'type': 'static_library',
       'sources': [
         'core/fxcrt/extension.h',
-        'core/fxcrt/fxcrt_platforms.cpp',
-        'core/fxcrt/fxcrt_platforms.h',
-        'core/fxcrt/fxcrt_posix.cpp',
-        'core/fxcrt/fxcrt_posix.h',
-        'core/fxcrt/fxcrt_stream.cpp',
-        'core/fxcrt/fxcrt_windows.cpp',
-        'core/fxcrt/fxcrt_windows.h',
         'core/fxcrt/fx_basic_array.cpp',
         'core/fxcrt/fx_basic_bstring.cpp',
         'core/fxcrt/fx_basic_buffer.cpp',
@@ -618,16 +611,25 @@
         'core/fxcrt/fx_unicode.cpp',
         'core/fxcrt/fx_xml_composer.cpp',
         'core/fxcrt/fx_xml_parser.cpp',
-        'core/fxcrt/include/fx_basic.h',
-        'core/fxcrt/include/fx_coordinates.h',
-        'core/fxcrt/include/fx_ext.h',
-        'core/fxcrt/include/fx_memory.h',
-        'core/fxcrt/include/fx_safe_types.h',
-        'core/fxcrt/include/fx_stream.h',
-        'core/fxcrt/include/fx_string.h',
-        'core/fxcrt/include/fx_system.h',
-        'core/fxcrt/include/fx_ucd.h',
-        'core/fxcrt/include/fx_xml.h',
+        'core/fxcrt/fxcrt_platforms.cpp',
+        'core/fxcrt/fxcrt_platforms.h',
+        'core/fxcrt/fxcrt_posix.cpp',
+        'core/fxcrt/fxcrt_posix.h',
+        'core/fxcrt/fxcrt_stream.cpp',
+        'core/fxcrt/fxcrt_windows.cpp',
+        'core/fxcrt/fxcrt_windows.h',
+        'core/fxcrt/include/cfx_retain_ptr.h',
+        'core/include/fxcrt/fx_basic.h',
+        'core/include/fxcrt/fx_bidi.h',
+        'core/include/fxcrt/fx_coordinates.h',
+        'core/include/fxcrt/fx_ext.h',
+        'core/include/fxcrt/fx_memory.h',
+        'core/include/fxcrt/fx_safe_types.h',
+        'core/include/fxcrt/fx_stream.h',
+        'core/include/fxcrt/fx_string.h',
+        'core/include/fxcrt/fx_system.h',
+        'core/include/fxcrt/fx_ucd.h',
+        'core/include/fxcrt/fx_xml.h',
         'core/fxcrt/plex.h',
         'core/fxcrt/xml_int.h',
       ],
@@ -895,6 +897,7 @@
         'test_support',
       ],
       'sources': [
+        'core/fxcrt/cfx_retain_ptr_unittest.cpp',
         'core/fpdfapi/fpdf_font/fpdf_font_cid_unittest.cpp',
         'core/fpdfapi/fpdf_font/fpdf_font_unittest.cpp',
         'core/fpdfapi/fpdf_page/fpdf_page_parser_old_unittest.cpp',