Enable loading native libraries with RTLD_DEEPBIND

base/native_library.h

Index: base/native_library.h
diff --git a/base/native_library.h b/base/native_library.h
index b4f3a3cd1ba267000848b09c0ee9d8af7983387f..2bcf0885b6643c6d6e0786073b8276f6b64d0fb7 100644
--- a/base/native_library.h
+++ b/base/native_library.h
@@ -65,12 +65,31 @@ struct BASE_EXPORT NativeLibraryLoadError {
 #endif  // OS_WIN
 };
 
+struct BASE_EXPORT NativeLibraryOptions {
+  NativeLibraryOptions() {}

[Primiano Tucci (use gerrit), 2016/08/25 21:10:53]

didn't catchup with C++11 too much. Is the copy ctor of this working as
intended? Don't you need a =default copy ctor?

[Ken Rockot(use gerrit already), 2016/08/25 21:25:01]

It's not necessary, but given the confusion I added an explicit default copy
ctor. Seems harmless imho.

+
+  // If |true|, a loaded library is required to prefer local symbol resolution
+  // before considering global symbols. Note that this is already the default
+  // behavior on most systems. Setting this to |false| does not guarantee the
+  // inverse, i.e., it does not force a preference for global symbols over local
+  // ones.
+  bool prefer_own_symbols = false;
+};
+
 // Loads a native library from disk.  Release it with UnloadNativeLibrary when
 // you're done.  Returns NULL on failure.
 // If |error| is not NULL, it may be filled in on load error.
 BASE_EXPORT NativeLibrary LoadNativeLibrary(const FilePath& library_path,
                                             NativeLibraryLoadError* error);
 
+// Loads a native library from disk.  Release it with UnloadNativeLibrary when
+// you're done.  Returns NULL on failure.
+// If |error| is not NULL, it may be filled in on load error.
+BASE_EXPORT NativeLibrary LoadNativeLibraryWithOptions(
+    const FilePath& library_path,
+    const NativeLibraryOptions& options,
+    NativeLibraryLoadError* error);
+
 #if defined(OS_WIN)
 // Loads a native library from disk.  Release it with UnloadNativeLibrary when
 // you're done.