Hide the tab indicators and the shelf when in immersive + tab fullscreen

chrome/browser/fullscreen_win.cc

Index: chrome/browser/fullscreen_win.cc
diff --git a/chrome/browser/fullscreen_win.cc b/chrome/browser/fullscreen_win.cc
index 4c3da9f29fad7a4b4a4cb00b521d832f03656ecd..ad8f60431350c65537eba094ca6e72b515f9c8f8 100644
--- a/chrome/browser/fullscreen_win.cc
+++ b/chrome/browser/fullscreen_win.cc
@@ -13,6 +13,7 @@
 #if defined(USE_ASH)
 #include "ash/wm/window_util.h"
 #include "chrome/browser/ui/host_desktop.h"
+#include "ui/aura/window.h"
 #endif
 
 static bool IsPlatformFullScreenMode() {
@@ -100,10 +101,23 @@ static bool IsFullScreenConsoleMode() {
   return (modes & (CONSOLE_FULLSCREEN | CONSOLE_FULLSCREEN_HARDWARE)) != 0;
 }
 
+#if defined(USE_ASH)
+// Returns true if the active window or one its ancestors is fullscreen.
+static bool IsActiveWindowFullscreen() {
+  aura::Window* window = ash::wm::GetActiveWindow();
+  while (window) {
+    if (ash::wm::IsWindowFullscreen(window))
+      return true;
+    window = window->parent();
+  }
+  return false;
+}
+#endif
+
 bool IsFullScreenMode() {
 #if defined(USE_ASH)
   if (chrome::GetActiveDesktop() == chrome::HOST_DESKTOP_TYPE_ASH)
-    return ash::wm::IsActiveWindowFullscreen();
+    return IsActiveWindowFullscreen();
 #endif
   return IsPlatformFullScreenMode() ||
          IsFullScreenWindowMode() ||