Use actual type instead CFX_Deletable

BUILD.gn

Index: BUILD.gn
diff --git a/BUILD.gn b/BUILD.gn
index 7dda81dbc7e98bb384da93ed584c146c8d18fde7..1b5add6ec90209b64df25ca0ffff29d7d23beb3c 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -80,11 +80,12 @@ static_library("pdfium") {
     "fpdfsdk/fsdk_baseannot.cpp",
     "fpdfsdk/fsdk_baseform.cpp",
     "fpdfsdk/fsdk_mgr.cpp",
-    "fpdfsdk/fsdk_rendercontext.cpp",
+    "fpdfsdk/fsdk_pauseadapter.cpp",
     "fpdfsdk/include/fsdk_actionhandler.h",
     "fpdfsdk/include/fsdk_annothandler.h",
     "fpdfsdk/include/fsdk_baseannot.h",
     "fpdfsdk/include/fsdk_baseform.h",
+    "fpdfsdk/include/fsdk_pauseadapter.h",
     "public/fpdf_dataavail.h",
     "public/fpdf_doc.h",
     "public/fpdf_edit.h",
@@ -253,6 +254,7 @@ static_library("fpdfdoc") {
 static_library("fpdfapi") {
   sources = [
     "core/fpdfapi/cpdf_modulemgr.cpp",
+    "core/fpdfapi/cpdf_pagerendercontext.cpp",
     "core/fpdfapi/fpdf_cmaps/CNS1/Adobe-CNS1-UCS2_5.cpp",
     "core/fpdfapi/fpdf_cmaps/CNS1/B5pc-H_0.cpp",
     "core/fpdfapi/fpdf_cmaps/CNS1/B5pc-V_0.cpp",
@@ -472,6 +474,7 @@ static_library("fpdfapi") {
     "core/fpdfapi/fpdf_render/include/cpdf_textrenderer.h",
     "core/fpdfapi/fpdf_render/render_int.h",
     "core/fpdfapi/include/cpdf_modulemgr.h",
+    "core/fpdfapi/include/cpdf_pagerendercontext.h",
   ]
   configs += [ ":pdfium_core_config" ]
 }