fix: misc-use-internal-linkage warnings (#44843)

* refactor: misc-use-internal-linkage warnings in context bridge

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

- ExposeAPIInWorld()
- IsCalledFromMainWorld()
- OverrideGlobalPropertyFromIsolatedWorld()
- OverrideGlobalValueFromIsolatedWorld()
- TraceKeyPath()

* refactor: misc-use-internal-linkage warnings in skia util

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

- struct ScaleFactorPair
- kScaleFactorPairs[]
- GetScaleFactorFromPath()
- AddImageSkiaRepFromPath()

* refactor: misc-use-internal-linkage warnings in printing util

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

- GetFullPagePlugin()

* refactor: misc-use-internal-linkage warnings in blijnk converter

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

- GetKeyLocationCode()
- ModifiersToArray()

* refactor: misc-use-internal-linkage warnings in extrension system

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

- ParseManifest()

* refactor: misc-use-internal-linkage warnings in skia util

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

- GetFrameTokenMap()
- GetFrameTreeNodeIdMap()

* refactor: misc-use-internal-linkage warnings in electron_api_utility_process.cc

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

- GetAllUtilityProcessWrappers()

* refactor: misc-use-internal-linkage warnings in electron_api_menu

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

- InvokeBoolMethod()

* refactor: misc-use-internal-linkage warnings in platform util

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

- struct TrashItemResult
- TrashItemOnBlockingThread()

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