Null check profile_ before using it to fix a crash.

Bug: 994384
Change-Id: Ie106d0ba2362f58caaae8669bde7af1ca3f6e53e
AX-Relnotes: Fixes crash
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2638929
Commit-Queue: Akihiro Ota <akihiroota@chromium.org>
Reviewed-by: Akihiro Ota <akihiroota@chromium.org>
Auto-Submit: Katie Dektar <katie@chromium.org>
Cr-Commit-Position: refs/heads/master@{#845681}

chrome/browser/ash/accessibility/accessibility_manager.cc

@@ -693,6 +693,9 @@ void AccessibilityManager::OnAccessibilityCommonChanged(
 
 void AccessibilityManager::RequestAutoclickScrollableBoundsForPoint(
     gfx::Point& point_in_screen) {
+  if (!profile_)
+    return;
+
   extensions::EventRouter* event_router =
       extensions::EventRouter::Get(profile_);
   std::unique_ptr<base::ListValue> event_args = extensions::api::