fix: pass frame_->IsMaximized() to GetWindowFrameProvider

This ensures that the toolkit renders the window decorations in maximized mode
while the window is maximized to ensure that there is no empty space around the window.

shell/browser/ui/views/client_frame_view_linux.cc

@@ -113,7 +113,7 @@ void ClientFrameViewLinux::Init(NativeWindowViews* window,
   host_supports_client_frame_shadow_ = tree_host->SupportsClientFrameShadow();
 
   frame_provider_ = views::LinuxUI::instance()->GetWindowFrameProvider(
-      !host_supports_client_frame_shadow_);
+      !host_supports_client_frame_shadow_, frame_->IsMaximized());
 
   UpdateWindowTitle();
 
@@ -256,6 +256,9 @@ void ClientFrameViewLinux::Layout() {
     return;
   }
 
+  frame_provider_ = views::LinuxUI::instance()->GetWindowFrameProvider(
+      !host_supports_client_frame_shadow_, frame_->IsMaximized());
+
   UpdateButtonImages();
   LayoutButtons();