linux: don't always print dlopen errors from LoadNativeLibrary

base/native_library_linux.cc

Index: base/native_library_linux.cc
diff --git a/base/native_library_linux.cc b/base/native_library_linux.cc
index e282bce2213f5d4131d4db1b1275b0eab984b12a..4a1ba1b25c6c9594a92bf0d80c4d4cbfea685b93 100644
--- a/base/native_library_linux.cc
+++ b/base/native_library_linux.cc
@@ -14,7 +14,8 @@
 namespace base {
 
 // static
-NativeLibrary LoadNativeLibrary(const FilePath& library_path) {
+NativeLibrary LoadNativeLibrary(const FilePath& library_path,
+                                std::string* error) {
   // dlopen() opens the file off disk.
   base::ThreadRestrictions::AssertIOAllowed();
 
@@ -23,16 +24,8 @@ NativeLibrary LoadNativeLibrary(const FilePath& library_path) {
   // http://crbug.com/17943, http://crbug.com/17557, http://crbug.com/36892,
   // and http://crbug.com/40794.
   void* dl = dlopen(library_path.value().c_str(), RTLD_LAZY);
-  if (!dl) {
-    std::string error_message = dlerror();
-    // Some obsolete plugins depend on libxul or libxpcom.
-    // Ignore the error messages when failing to load these.
-    if (error_message.find("libxul.so") == std::string::npos &&
-        error_message.find("libxpcom.so") == std::string::npos) {
-      LOG(ERROR) << "dlopen failed when trying to open " << library_path.value()
-                 << ": " << error_message;
-    }
-  }
+  if (!dl && error)
+    *error = dlerror();
 
   return dl;
 }