Support the full-screen state when showing a chrome window

The SHOW_STATE_FULLSCREEN state has not been supported in Windows
so this CL implements it and allows browser_tests to pass the
test for creating a full screen extension window without manually
calling setFullscreenMode().

BUG=473228

Review URL: https://codereview.chromium.org/1138383008

Cr-Commit-Position: refs/heads/master@{#330602}

chrome/browser/extensions/api/tabs/tabs_api.cc

@@ -669,8 +669,8 @@ bool WindowsCreateFunction::RunSync() {
   if (create_params.initial_show_state == ui::SHOW_STATE_MINIMIZED)
     new_window->window()->Minimize();
 #endif
-#if (defined(OS_LINUX) && !defined(OS_CHROMEOS)) || defined(OS_WIN)
-  // On Desktop Linux and Windows, managers don't handle fullscreen state to
+#if (defined(OS_LINUX) && !defined(OS_CHROMEOS))
+  // On Desktop Linux managers don't handle fullscreen state to
   // create window for now.
   if (create_params.initial_show_state == ui::SHOW_STATE_FULLSCREEN)
     controller->SetFullscreenMode(true, extension()->url());

ui/views/win/hwnd_message_handler.cc

@@ -571,6 +571,10 @@ void HWNDMessageHandler::ShowWindowWithState(ui::WindowShowState show_state) {
     case ui::SHOW_STATE_NORMAL:
       native_show_state = SW_SHOWNORMAL;
       break;
+    case ui::SHOW_STATE_FULLSCREEN:
+      native_show_state = SW_SHOWNORMAL;
+      SetFullscreen(true);
+      break;
     default:
       native_show_state = delegate_->GetInitialShowState();
       break;