exo: Ignore synthetic key repeat events.

Exo clients should not see these events and instead handle
key repeat on the client side.

Bug: 847500
Test: exo_unittests
Change-Id: I4d4c755dbe0a2fffe24f3ce85fd70a3608cfed7c
Reviewed-on: https://chromium-review.googlesource.com/1079768Reviewed-by: Daniele Castagna <dcastagna@chromium.org>
Commit-Queue: David Reveman <reveman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#563095}

components/exo/keyboard.cc

@@ -217,6 +217,10 @@ void Keyboard::OnKeyEvent(ui::KeyEvent* event) {
   if (!focus_)
     return;
 
+  // Ignore synthetic key repeat events.
+  if (event->is_repeat())
+    return;
+
   // Process reserved accelerators before sending it to client.
   if (ProcessAcceleratorIfReserved(focus_, event)) {
     // Discard a key press event if it's a reserved accelerator and it's

components/exo/seat.cc

@@ -107,6 +107,9 @@ void Seat::OnWindowFocused(aura::Window* gained_focus,
 // ui::EventHandler overrides:
 
 void Seat::OnKeyEvent(ui::KeyEvent* event) {
+  // Ignore synthetic key repeat events.
+  if (event->is_repeat())
+    return;
   switch (event->type()) {
     case ui::ET_KEY_PRESSED:
       pressed_keys_.insert(event->code());