Add padding to the fullscreen exit bubble on linux.

chrome/browser/ui/fullscreen_exit_bubble.cc

Index: chrome/browser/ui/fullscreen_exit_bubble.cc
diff --git a/chrome/browser/ui/fullscreen_exit_bubble.cc b/chrome/browser/ui/fullscreen_exit_bubble.cc
index 1a6345adba365a68151075cd7b5919ecf6441a4a..5678f0840cb960cd570dddfd24e9448f52cdd526 100644
--- a/chrome/browser/ui/fullscreen_exit_bubble.cc
+++ b/chrome/browser/ui/fullscreen_exit_bubble.cc
@@ -12,7 +12,13 @@
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/gfx/rect.h"
 
+// NOTE(koz): Linux doesn't use the thick shadowed border, so we add padding
+// here.
+#ifdef LINUX
+const int FullscreenExitBubble::kPaddingPx = 8;
+#else
 const int FullscreenExitBubble::kPaddingPx = 0;
+#endif
 const int FullscreenExitBubble::kInitialDelayMs = 3800;
 const int FullscreenExitBubble::kIdleTimeMs = 2300;
 const int FullscreenExitBubble::kPositionCheckHz = 10;