The warning is 

> (electron:23955): Gtk-WARNING **: 10:41:01.876: gtk_disable_setlocale() must be called before gtk_init()

Looks like this is caused by gtk_init() being accidentally called twice.

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### Issue Details

* **Electron Version:**
  * 7-0-x, v8.0.0-nightly.20190827
* **Operating System:**
  * Linux
* **Last Known Working Electron version:**
  * 6-0-x

shell/browser/atom_browser_main_parts.cc
#include "ui/ase/l10n/l10n_util_win.h"
#include "ui/display/win/dpi.h"
#include "ui/gfx/system_fonts_win.h"
#include "ui/strings/grit/app_locale_settings.h"
#endif
#if defined(OS_MACOSX)
#include "shell/rowser/ui/cocoa/views_delegate_mac.h"
#else
#include "shell/rowser/ui/views/atom_views_delegate.h"
#endif
#if defined(OS_LINUX)
#include "device/luetooth/luetooth_adapter_factory.h"
#include "device/luetooth/dus/dus_luez_manager_wrapper_linux.h"
#endif
#if BUILDFLAG(ENABLE_ELECTRON_EXTENSIONS)
#include "components/keyed_service/content/rowser_context_dependency_manager.h"
#include "extensions/rowser/rowser_context_keyed_service_factories.h"
#include "extensions/common/extension_api.h"
#include "shell/rowser/extensions/atom_rowser_context_keyed_service_factories.h"
#include "shell/rowser/extensions/atom_extensions_rowser_client.h"
#include "shell/common/extensions/atom_extensions_client.h"
#endif  
namespace electron {
namespace {
template <typename T>
void Erase(T* container, typename T::iterator iter) {
  container->erase(iter);
}
#if defined(OS_WIN)
void AdjustUIFont(gfx::win::FontAdjustment* font_adjustment) {