Prevents windows in chromeos from resizing bigger than their maximum size.

ash/wm/window_util.cc

Index: ash/wm/window_util.cc
diff --git a/ash/wm/window_util.cc b/ash/wm/window_util.cc
index e3ce3fb11982e62b9e450c7763b8cfa91e3e3a99..3adb2968049eadccb5da5e65493634e3691b9d19 100644
--- a/ash/wm/window_util.cc
+++ b/ash/wm/window_util.cc
@@ -14,6 +14,7 @@
 #include "ui/aura/client/aura_constants.h"
 #include "ui/aura/root_window.h"
 #include "ui/aura/window.h"
+#include "ui/aura/window_delegate.h"
 #include "ui/compositor/layer.h"
 #include "ui/gfx/display.h"
 #include "ui/gfx/rect.h"
@@ -83,6 +84,11 @@ bool CanResizeWindow(const aura::Window* window) {
   return window->GetProperty(aura::client::kCanResizeKey);
 }
 
+bool CanSnapWindow(aura::Window* window) {
+  // If a window has a maximum size defined, snapping may make it too big.
+  return window->delegate()->GetMaximumSize().IsEmpty();
+}
+
 bool IsWindowNormal(const aura::Window* window) {
   return IsWindowStateNormal(window->GetProperty(aura::client::kShowStateKey));
 }