Kill off fpdf_render_cache.cpp

BUILD.gn

Index: BUILD.gn
diff --git a/BUILD.gn b/BUILD.gn
index cb5962dce1e531e74b34ad60be005f20b422f65c..4125d0f11b6bc6332e986116ab7a5f4f1b556309 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -545,10 +545,13 @@ static_library("fpdfapi") {
     "core/fpdfapi/render/cpdf_devicebuffer.h",
     "core/fpdfapi/render/cpdf_docrenderdata.cpp",
     "core/fpdfapi/render/cpdf_docrenderdata.h",
+    "core/fpdfapi/render/cpdf_imagecacheentry.cpp",
+    "core/fpdfapi/render/cpdf_imagecacheentry.h",
     "core/fpdfapi/render/cpdf_imageloader.cpp",
     "core/fpdfapi/render/cpdf_imageloader.h",
     "core/fpdfapi/render/cpdf_imagerenderer.cpp",
     "core/fpdfapi/render/cpdf_imagerenderer.h",
+    "core/fpdfapi/render/cpdf_pagerendercache.cpp",
     "core/fpdfapi/render/cpdf_pagerendercache.h",
     "core/fpdfapi/render/cpdf_progressiverenderer.cpp",
     "core/fpdfapi/render/cpdf_progressiverenderer.h",
@@ -567,7 +570,6 @@ static_library("fpdfapi") {
     "core/fpdfapi/render/cpdf_type3cache.h",
     "core/fpdfapi/render/cpdf_type3glyphs.cpp",
     "core/fpdfapi/render/cpdf_type3glyphs.h",
-    "core/fpdfapi/render/fpdf_render_cache.cpp",
     "core/fpdfapi/render/fpdf_render_image.cpp",
     "core/fpdfapi/render/fpdf_render_loadimage.cpp",
     "core/fpdfapi/render/fpdf_render_text.cpp",