Start using the controller in app's view.

chrome/browser/ui/exclusive_access/mouse_lock_controller.cc

Index: chrome/browser/ui/exclusive_access/mouse_lock_controller.cc
diff --git a/chrome/browser/ui/exclusive_access/mouse_lock_controller.cc b/chrome/browser/ui/exclusive_access/mouse_lock_controller.cc
index bfd3025cd1d1d73f9c1bb955ac0ae704fd65091e..c0133be9c2f20629504c0237cb2cf017743c4fe7 100644
--- a/chrome/browser/ui/exclusive_access/mouse_lock_controller.cc
+++ b/chrome/browser/ui/exclusive_access/mouse_lock_controller.cc
@@ -157,12 +157,23 @@ bool MouseLockController::OnAcceptExclusiveAccessPermission() {
                                       std::string(), CONTENT_SETTING_ALLOW);
     }
 
+    ExclusiveAccessContext* context =
+        exclusive_access_manager()->exclusive_access_context();
     WebContents* tab = exclusive_access_tab();
-    if (tab && tab->GotResponseToLockMouseRequest(true)) {
-      mouse_lock_state_ = MOUSELOCK_ACCEPTED;
+    if (context->UseCallbackForMouseLock()) {
+      if (tab && context->MouseLockCallback(true)) {
+        mouse_lock_state_ = MOUSELOCK_ACCEPTED;
+      } else {
+        mouse_lock_state_ = MOUSELOCK_NOT_REQUESTED;
+        SetTabWithExclusiveAccess(nullptr);
+      }
     } else {
-      mouse_lock_state_ = MOUSELOCK_NOT_REQUESTED;
-      SetTabWithExclusiveAccess(nullptr);
+      if (tab && tab->GotResponseToLockMouseRequest(true)) {
+        mouse_lock_state_ = MOUSELOCK_ACCEPTED;
+      } else {
+        mouse_lock_state_ = MOUSELOCK_NOT_REQUESTED;
+        SetTabWithExclusiveAccess(nullptr);
+      }
     }
     NotifyMouseLockChange();
     return true;