Rename CPDFDoc_Environment to CPDFSDK_Environment

BUILD.gn

Index: BUILD.gn
diff --git a/BUILD.gn b/BUILD.gn
index bdefb73dd418c2b17bb515f54f26c9cbb35524bb..ccb1e0cca388a98e8a7410350dc1ed3d125ace31 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -65,7 +65,6 @@ static_library("pdfium") {
     "fpdfsdk/cba_annotiterator.cpp",
     "fpdfsdk/cfx_systemhandler.cpp",
     "fpdfsdk/cfx_systemhandler.h",
-    "fpdfsdk/cpdfdoc_environment.cpp",
     "fpdfsdk/cpdfsdk_annot.cpp",
     "fpdfsdk/cpdfsdk_annothandlermgr.cpp",
     "fpdfsdk/cpdfsdk_annotiterator.cpp",
@@ -73,6 +72,7 @@ static_library("pdfium") {
     "fpdfsdk/cpdfsdk_baannothandler.cpp",
     "fpdfsdk/cpdfsdk_datetime.cpp",
     "fpdfsdk/cpdfsdk_document.cpp",
+    "fpdfsdk/cpdfsdk_environment.cpp",
     "fpdfsdk/cpdfsdk_interform.cpp",
     "fpdfsdk/cpdfsdk_pageview.cpp",
     "fpdfsdk/cpdfsdk_widget.cpp",
@@ -95,7 +95,6 @@ static_library("pdfium") {
     "fpdfsdk/fsdk_actionhandler.cpp",
     "fpdfsdk/fsdk_pauseadapter.cpp",
     "fpdfsdk/include/cba_annotiterator.h",
-    "fpdfsdk/include/cpdfdoc_environment.h",
     "fpdfsdk/include/cpdfsdk_annot.h",
     "fpdfsdk/include/cpdfsdk_annothandlermgr.h",
     "fpdfsdk/include/cpdfsdk_annotiterator.h",
@@ -103,6 +102,7 @@ static_library("pdfium") {
     "fpdfsdk/include/cpdfsdk_baannothandler.h",
     "fpdfsdk/include/cpdfsdk_datetime.h",
     "fpdfsdk/include/cpdfsdk_document.h",
+    "fpdfsdk/include/cpdfsdk_environment.h",
     "fpdfsdk/include/cpdfsdk_interform.h",
     "fpdfsdk/include/cpdfsdk_pageview.h",
     "fpdfsdk/include/cpdfsdk_widget.h",