cros: allow aura window not considered activatable for pointer event

ui/wm/core/base_focus_rules.cc

Index: ui/wm/core/base_focus_rules.cc
diff --git a/ui/wm/core/base_focus_rules.cc b/ui/wm/core/base_focus_rules.cc
index e38aa2e5508dcc9779ea303e54d2d5352e851713..080ca3f8ce70a4daef861aa52c282491a4a34ac8 100644
--- a/ui/wm/core/base_focus_rules.cc
+++ b/ui/wm/core/base_focus_rules.cc
@@ -16,7 +16,7 @@ namespace {
 aura::Window* GetFocusedWindow(aura::Window* context) {
   aura::client::FocusClient* focus_client =
       aura::client::GetFocusClient(context);
-  return focus_client ? focus_client->GetFocusedWindow() : NULL;
+  return focus_client ? focus_client->GetFocusedWindow() : nullptr;
 }
 
 }  // namespace
@@ -24,11 +24,9 @@ aura::Window* GetFocusedWindow(aura::Window* context) {
 ////////////////////////////////////////////////////////////////////////////////
 // BaseFocusRules, protected:
 
-BaseFocusRules::BaseFocusRules() {
-}
+BaseFocusRules::BaseFocusRules() = default;
 
-BaseFocusRules::~BaseFocusRules() {
-}
+BaseFocusRules::~BaseFocusRules() = default;
 
 bool BaseFocusRules::IsWindowConsideredVisibleForActivation(
     aura::Window* window) const {
@@ -91,6 +89,12 @@ bool BaseFocusRules::CanFocusWindow(aura::Window* window) const {
   return window->CanFocus();
 }
 
+bool BaseFocusRules::IsWindowConsideredActivatableForEvent(
+    aura::Window* window,
+    ui::Event* event) const {
+  return true;
+}
+
 aura::Window* BaseFocusRules::GetToplevelWindow(aura::Window* window) const {
   aura::Window* parent = window->parent();
   aura::Window* child = window;
@@ -101,7 +105,7 @@ aura::Window* BaseFocusRules::GetToplevelWindow(aura::Window* window) const {
     parent = parent->parent();
     child = child->parent();
   }
-  return NULL;
+  return nullptr;
 }
 
 aura::Window* BaseFocusRules::GetActivatableWindow(aura::Window* window) const {
@@ -133,7 +137,7 @@ aura::Window* BaseFocusRules::GetActivatableWindow(aura::Window* window) const {
     parent = parent->parent();
     child = child->parent();
   }
-  return NULL;
+  return nullptr;
 }
 
 aura::Window* BaseFocusRules::GetFocusableWindow(aura::Window* window) const {
@@ -150,7 +154,7 @@ aura::Window* BaseFocusRules::GetFocusableWindow(aura::Window* window) const {
     if (toplevel)
       activatable = GetNextActivatableWindow(toplevel);
     if (!activatable)
-      return NULL;
+      return nullptr;
   }
 
   if (!activatable->Contains(window)) {
@@ -172,7 +176,7 @@ aura::Window* BaseFocusRules::GetNextActivatableWindow(
 
   // Can be called from the RootWindow's destruction, which has a NULL parent.
   if (!ignore->parent())
-    return NULL;
+    return nullptr;
 
   // In the basic scenarios handled by BasicFocusRules, the pool of activatable
   // windows is limited to the |ignore|'s siblings.
@@ -188,7 +192,7 @@ aura::Window* BaseFocusRules::GetNextActivatableWindow(
     if (CanActivateWindow(cur))
       return cur;
   }
-  return NULL;
+  return nullptr;
 }
 
 }  // namespace wm