Fix incorrect TabCloseButton bounds in right-to-left layout.

The elements Tab draws directly on the canvas need to be manually
mirrored if the View's layout is right-to-left.

BUG=315941
TEST=verify tab close button works correctly in both LTR and RTL layouts.
R=sky@chromium.org, tdanderson@chromium.org

Review URL: https://codereview.chromium.org/66543004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@234048 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/ui/views/tabs/tab.cc

@@ -431,6 +431,7 @@ class Tab::TabCloseButton : public views::ImageButton {
     tab_->GetHitTestMask(source, &tab_mask);
 
     gfx::Rect button_bounds(GetContentsBounds());
+    button_bounds.set_x(GetMirroredXForRect(button_bounds));
     gfx::RectF tab_bounds_f(gfx::SkRectToRectF(tab_mask.getBounds()));
     views::View::ConvertRectToTarget(tab_, this, &tab_bounds_f);
     gfx::Rect tab_bounds = gfx::ToEnclosingRect(tab_bounds_f);