[md] Give each infobar its own layer.

chrome/browser/ui/views/infobars/infobar_view.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/views/infobars/infobar_view.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 67 matching lines @@
 
 InfoBarView::InfoBarView(scoped_ptr<infobars::InfoBarDelegate> delegate)
     : infobars::InfoBar(std::move(delegate)),
       views::ExternalFocusTracker(this, nullptr),
       child_container_(new views::View()),
       icon_(nullptr),
       close_button_(nullptr) {
   set_owned_by_client();  // InfoBar deletes itself at the appropriate time.
   set_background(
       new InfoBarBackground(infobars::InfoBar::delegate()->GetInfoBarType()));
+  SetEventTargeter(make_scoped_ptr(new views::ViewTargeter(this)));
 
   AddChildView(child_container_);
 
   if (ui::MaterialDesignController::IsModeMaterial()) {
+    SetPaintToLayer(true);
+    layer()->SetFillsBoundsOpaquely(false);
+
     child_container_->SetPaintToLayer(true);
     child_container_->layer()->SetMasksToBounds(true);
     // Since MD doesn't use a gradient, we can set a solid bg color.
     child_container_->set_background(
         views::Background::CreateSolidBackground(infobars::InfoBar::GetTopColor(
             infobars::InfoBar::delegate()->GetInfoBarType())));
   }
 }
 
 InfoBarView::~InfoBarView() {
@@ skipping 316 matching lines @@
 void InfoBarView::OnWillChangeFocus(View* focused_before, View* focused_now) {
   views::ExternalFocusTracker::OnWillChangeFocus(focused_before, focused_now);
 
   // This will trigger some screen readers to read the entire contents of this
   // infobar.
   if (focused_before && focused_now && !Contains(focused_before) &&
       Contains(focused_now)) {
     NotifyAccessibilityEvent(ui::AX_EVENT_ALERT, true);
   }
 }
+
+bool InfoBarView::DoesIntersectRect(const View* target,
+                                    const gfx::Rect& rect) const {
+  DCHECK_EQ(this, target);
+  // Only events that intersect the portion below the arrow are interesting.
+  gfx::Rect non_arrow_bounds = GetLocalBounds();
+  non_arrow_bounds.Inset(0, arrow_height(), 0, 0);
+  return rect.Intersects(non_arrow_bounds);

[Evan Stade, 2016/03/14 23:23:47]

turns out Intersects is required to fix bug 593640

+}