helium/ui/cat: fix layout breakage when exiting fullscreen, again

fixes #590

Author: wukko

patches/helium/ui/experiments/compact-action-toolbar.patch

@@ -122,21 +122,23 @@
    // TODO(pbos): Investigate whether the side panels should be creatable when
 --- a/chrome/browser/ui/views/frame/layout/browser_view_layout_impl_old.cc
 +++ b/chrome/browser/ui/views/frame/layout/browser_view_layout_impl_old.cc
-@@ -411,6 +411,13 @@ void BrowserViewLayoutImplOld::LayoutTab
-     views().tab_strip_region_view->SetBounds(0, 0, 0, 0);
-     return;
-   }
+@@ -406,6 +406,15 @@ void BrowserViewLayoutImplOld::LayoutVer
+ void BrowserViewLayoutImplOld::LayoutTabStripRegion(
+     gfx::Rect& available_bounds) {
+   TRACE_EVENT0("ui", "BrowserViewLayout::LayoutTabStripRegion");
 +
-+  // If the CAT feature is enabled, then the tab strip is in the toolbar.
-+  // We shouldn't layout it here.
-+  if (features::IsHeliumCatEnabled()) {
++  // If the CAT feature is enabled and we're in a normal browser,
++  // skip laying out the tab strip region. It's laid out in the toolbar.
++  // In other browser types the tab strip isn't drawn, so the next
++  // if statement will hide it.
++  if (features::IsHeliumCatEnabled() && browser()->is_type_normal()) {
 +    return;
 +  }
 +
-   // This retrieves the bounds for the tab strip based on whether or not we show
-   // anything to the left of it, like the incognito avatar.
-   gfx::Rect tab_strip_region_bounds(
-@@ -458,6 +465,15 @@ void BrowserViewLayoutImplOld::LayoutToo
+   if (!delegate().ShouldDrawTabStrip()) {
+     SetViewVisibility(views().tab_strip_region_view, false);
+     views().tab_strip_region_view->SetBounds(0, 0, 0, 0);
+@@ -458,6 +467,15 @@ void BrowserViewLayoutImplOld::LayoutToo
      toolbar_bounds.set_x(available_bounds.x());
      toolbar_bounds.set_width(toolbar_bounds.width() - kVerticalTabStripWidth);
      views().toolbar->SetBoundsRect(toolbar_bounds);