exo: Hide cursor for direct input

Exosphere renders its own cursor which does not get hidden by the
global logic to hide a cursor when using direct input mouse events.

This CL will make sure the cursor widget gets hidden or restored
depending whether direct input is used or not.

BUG=636458
TEST=use direct input in exo app. Cursor should be hidden.

Review-Url: https://codereview.chromium.org/2295513002
Cr-Commit-Position: refs/heads/master@{#415326}

components/exo/pointer.cc

@@ -103,7 +103,7 @@ void Pointer::SetCursor(Surface* surface, const gfx::Point& hotspot) {
       surface_->window()->Show();
 
     // Show widget now that cursor has been defined.
-    if (!widget_->IsVisible())
+    if (!widget_->IsVisible() && !is_direct_input_)
       widget_->Show();
   }
 
@@ -251,8 +251,11 @@ void Pointer::OnMouseEvent(ui::MouseEvent* event) {
       break;
   }
 
+  if ((event->flags() & ui::EF_IS_SYNTHESIZED) == 0)
+    is_direct_input_ = (event->flags() & ui::EF_DIRECT_INPUT) != 0;
+
   // Update cursor widget to reflect current focus and pointer location.
-  if (focus_) {
+  if (focus_ && !is_direct_input_) {
     if (!widget_)
       CreatePointerWidget();
 
@@ -265,6 +268,8 @@ void Pointer::OnMouseEvent(ui::MouseEvent* event) {
     }
 
     UpdateCursorScale();
+    if (!widget_->IsVisible())
+      widget_->Show();
   } else {
     if (widget_ && widget_->IsVisible())
       widget_->Hide();

components/exo/pointer.h

@@ -107,6 +107,9 @@ class Pointer : public ui::EventHandler,
   // The current pointer force.
   float force_;
 
+  // True if the pointer is controlled via direct input.
+  bool is_direct_input_ = false;
+
   DISALLOW_COPY_AND_ASSIGN(Pointer);
 };