Draggable region support for frameless app window on CrOS.

chrome/browser/ui/views/extensions/shell_window_views.cc

Index: chrome/browser/ui/views/extensions/shell_window_views.cc
diff --git a/chrome/browser/ui/views/extensions/shell_window_views.cc b/chrome/browser/ui/views/extensions/shell_window_views.cc
index 387d1f9ed3dd73dd6c16e31dd115b8f25bdff37d..0b23aeac0361a6c3269c9740cba57bb103cea0e7 100644
--- a/chrome/browser/ui/views/extensions/shell_window_views.cc
+++ b/chrome/browser/ui/views/extensions/shell_window_views.cc
@@ -336,6 +336,20 @@ views::View* ShellWindowViews::GetInitiallyFocusedView() {
   return web_view_;
 }
 
+bool ShellWindowViews::ShouldDescendIntoChildForEventHandling(
+    gfx::NativeView child,
+    const gfx::Point& location) {
+#if defined(USE_AURA)
+  DCHECK_EQ(child, web_view_->web_contents()->GetView()->GetNativeView());
+  // Shell window should claim mouse events that fall within the draggable
+  // region.
+  return !draggable_region_.get() ||
+         !draggable_region_->contains(location.x(), location.y());
+#else
+  return true;
+#endif
+}
+
 void ShellWindowViews::OnFocus() {
   web_view_->RequestFocus();
 }