[Ash] Only snap windows that can maximize.

ash/wm/window_state_unittest.cc

Index: ash/wm/window_state_unittest.cc
diff --git a/ash/wm/window_state_unittest.cc b/ash/wm/window_state_unittest.cc
index cef8fbbe25304830a70be20b3c77c78a07f013b6..3a457286242087d398d4705ad26795ec5b6ff556 100644
--- a/ash/wm/window_state_unittest.cc
+++ b/ash/wm/window_state_unittest.cc
@@ -9,6 +9,7 @@
 #include "ash/test/ash_test_base.h"
 #include "ash/wm/window_state.h"
 #include "ash/wm/wm_event.h"
+#include "ui/aura/client/aura_constants.h"
 #include "ui/aura/test/test_window_delegate.h"
 #include "ui/aura/window.h"
 
@@ -124,9 +125,14 @@ TEST_F(WindowStateTest, SnapWindowMinimumSize) {
                                  kWorkAreaBounds.height());
   EXPECT_EQ(expected.ToString(), window->GetBoundsInScreen().ToString());
 
-  // It should not be possible to snap a window with a maximum size.
-  delegate.set_minimum_size(gfx::Size());
-  delegate.set_maximum_size(gfx::Size(kWorkAreaBounds.width() - 1, INT_MAX));
+  // It should not be possible to snap a window with a maximum size, or if it
+  // cannot be maximized.
+  delegate.set_maximum_size(gfx::Size(kWorkAreaBounds.width() - 1, 0));
+  EXPECT_FALSE(window_state->CanSnap());
+  delegate.set_maximum_size(gfx::Size(0, kWorkAreaBounds.height() - 1));
+  EXPECT_FALSE(window_state->CanSnap());
+  delegate.set_maximum_size(gfx::Size());
+  window->SetProperty(aura::client::kCanMaximizeKey, false);
   EXPECT_FALSE(window_state->CanSnap());
 }