Load language .pak files directly from the apk when using splits

ui/base/resource/resource_bundle_android.h

Index: ui/base/resource/resource_bundle_android.h
diff --git a/ui/base/resource/resource_bundle_android.h b/ui/base/resource/resource_bundle_android.h
index 437c473b424b69b00f79b8069b47ec62e8cf00e9..a9d3b1d1c564eb87c34b6b634760cfbc4c7b6cfc 100644
--- a/ui/base/resource/resource_bundle_android.h
+++ b/ui/base/resource/resource_bundle_android.h
@@ -24,10 +24,14 @@ UI_BASE_EXPORT void LoadMainAndroidPackFile(
 UI_BASE_EXPORT int GetMainAndroidPackFd(
     base::MemoryMappedFile::Region* out_region);
 
-// Returns the file descriptor and region for chrome_100_percent.pak
+// Returns the file descriptor and region for chrome_100_percent.pak.
 UI_BASE_EXPORT int GetCommonResourcesPackFd(
     base::MemoryMappedFile::Region* out_region);
 
+// Returns the file descriptor and region for the locale .pak file.
+UI_BASE_EXPORT int GetLocalePackFd(
+    base::MemoryMappedFile::Region* out_region);
+
 // Tell ResourceBundle to locate locale pak files via
 // GetPathForAndroidLocalePakWithinApk rather than looking for them on disk.
 UI_BASE_EXPORT void SetLocalePaksStoredInApk(bool value);