fix: misc-use-internal-linkage warnings (#44872)

* refactor: fix misc-use-internal-linkage warnings:

move impl functions into anonymous namespace so that they're not visible
to other compilation units

shell/renderer/api/electron_api_context_bridge.cc

@@ -659,6 +659,8 @@ v8::MaybeLocal<v8::Object> CreateProxyForAPI(
   }
 }
 
+namespace {
+
 void ExposeAPIInWorld(v8::Isolate* isolate,
                       const int world_id,
                       const std::string& key,
@@ -819,6 +821,8 @@ bool IsCalledFromMainWorld(v8::Isolate* isolate) {
   return isolate->GetCurrentContext() == main_context;
 }
 
+}  // namespace
+
 }  // namespace api
 
 }  // namespace electron