Fix horizontal scroll tab-switching behavior on Linux

chrome/browser/ui/views/frame/browser_root_view.cc

Index: chrome/browser/ui/views/frame/browser_root_view.cc
diff --git a/chrome/browser/ui/views/frame/browser_root_view.cc b/chrome/browser/ui/views/frame/browser_root_view.cc
index 6cc1a755617af59ef80c7a100bb4b697fecb5639..2a7c06ce59ff30c670a67a28c8fe6f21333e2864 100644
--- a/chrome/browser/ui/views/frame/browser_root_view.cc
+++ b/chrome/browser/ui/views/frame/browser_root_view.cc
@@ -131,7 +131,7 @@ bool BrowserRootView::OnMouseWheel(const ui::MouseWheelEvent& event) {
         hittest == HTCAPTION ||
         hittest == HTTOP) {
       int scroll_offset = abs(event.y_offset()) > abs(event.x_offset()) ?
-          event.y_offset() : -event.x_offset();
+          event.y_offset() : event.x_offset();
       Browser* browser = browser_view_->browser();
       TabStripModel* model = browser->tab_strip_model();
       // Switch to the next tab only if not at the end of the tab-strip.