Reduce the space above the tabstrip in Windows

chromium_src/chrome/browser/ui/views/frame/browser_frame_view_win.cc

@@ -12,6 +12,13 @@
     return top;                                        \
   }
 
+// The top frame border thickness is smaller when using updated horizontal tabs.
+#define BRAVE_BROWSER_FRAME_VIEW_WIN_FRAME_TOP_BORDER_THICKNESS \
+  if (tabs::features::HorizontalTabsUpdateEnabled()) {          \
+    return 2;                                                   \
+  }
+
 #include "src/chrome/browser/ui/views/frame/browser_frame_view_win.cc"  // IWYU pragma: export
 
+#undef BRAVE_BROWSER_FRAME_VIEW_WIN_FRAME_TOP_BORDER_THICKNESS
 #undef BRAVE_BROWSER_FRAME_VIEW_WIN_TOP_AREA_HEIGHT

patches/chrome-browser-ui-views-frame-browser_frame_view_win.cc.patch

@@ -1,12 +1,20 @@
 diff --git a/chrome/browser/ui/views/frame/browser_frame_view_win.cc b/chrome/browser/ui/views/frame/browser_frame_view_win.cc
-index 769e7e8ac3b3907328e1515c4346402891d59f03..8f5652b742a43ac913145c2aced1d2f641202061 100644
+index bd59ccd1b178450c7eba720ea8b235f24416a15e..40d21c79c71f8fb76dcaa8910ebd011db0443d19 100644
 --- a/chrome/browser/ui/views/frame/browser_frame_view_win.cc
 +++ b/chrome/browser/ui/views/frame/browser_frame_view_win.cc
-@@ -533,6 +533,7 @@ int BrowserFrameViewWin::TopAreaHeight(bool restored) const {
+@@ -488,6 +488,7 @@ int BrowserFrameViewWin::FrameTopBorderThickness(bool restored) const {
+       // default. When maximized, the OS sizes the window such that the border
+       // extends beyond the screen edges. In that case, we must return the
+       // default value.
++      BRAVE_BROWSER_FRAME_VIEW_WIN_FRAME_TOP_BORDER_THICKNESS
+       const int kTopResizeFrameArea = features::IsChromeRefresh2023() ? 1 : 5;
+       return kTopResizeFrameArea;
+     }
+@@ -547,6 +548,7 @@ int BrowserFrameViewWin::TopAreaHeight(bool restored) const {
                       : caption_button_container_->GetPreferredSize().height();
      return top;
    }
 +  BRAVE_BROWSER_FRAME_VIEW_WIN_TOP_AREA_HEIGHT
- 
+
    // In Refresh, the tabstrip controls its own top padding.
    if (features::IsChromeRefresh2023()) {