Rename IPDFSDK_PauseAdapater to CPDFSDK_PauseAdapter.

It is a concrete implementation of a different interface.

Change-Id: I251f2baae7e622992f8d4a8af5c8d0ab6b0e0186
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/59791
Commit-Queue: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
diff --git a/fpdfsdk/BUILD.gn b/fpdfsdk/BUILD.gn
index d2a36c4..e8d5774 100644
--- a/fpdfsdk/BUILD.gn
+++ b/fpdfsdk/BUILD.gn
@@ -38,6 +38,8 @@
     "cpdfsdk_interactiveform.h",
     "cpdfsdk_pageview.cpp",
     "cpdfsdk_pageview.h",
+    "cpdfsdk_pauseadapter.cpp",
+    "cpdfsdk_pauseadapter.h",
     "cpdfsdk_widget.cpp",
     "cpdfsdk_widget.h",
     "cpdfsdk_widgethandler.cpp",
@@ -66,8 +68,6 @@
     "fpdf_transformpage.cpp",
     "fpdf_view.cpp",
     "ipdfsdk_annothandler.h",
-    "ipdfsdk_pauseadapter.cpp",
-    "ipdfsdk_pauseadapter.h",
   ]
 
   configs += [ "../:pdfium_core_config" ]