Perform direct routing of mouse events when the pointer is locked.

content/browser/pointer_lock_browsertest_mac.mm

Index: content/browser/pointer_lock_browsertest_mac.mm
diff --git a/content/browser/pointer_lock_browsertest_mac.mm b/content/browser/pointer_lock_browsertest_mac.mm
new file mode 100644
index 0000000000000000000000000000000000000000..a8b334ca4a62d9d021857eb8dce490464a6debe3
--- /dev/null
+++ b/content/browser/pointer_lock_browsertest_mac.mm
@@ -0,0 +1,53 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "content/browser/pointer_lock_browsertest.h"
+
+#include "content/browser/renderer_host/render_widget_host_impl.h"
+#include "content/browser/renderer_host/render_widget_host_view_mac.h"
+#include "content/browser/web_contents/web_contents_view_mac.h"
+
+namespace content {
+
+namespace {
+
+class MockRenderWidgetHostView : public RenderWidgetHostViewMac {
+ public:
+  MockRenderWidgetHostView(RenderWidgetHost* host, bool is_guest_view_hack)
+      : RenderWidgetHostViewMac(host, is_guest_view_hack),
+        host_(RenderWidgetHostImpl::From(host)) {}
+  ~MockRenderWidgetHostView() override {
+    if (mouse_locked_)
+      UnlockMouse();
+  }
+
+  bool LockMouse() override {
+    mouse_locked_ = true;
+
+    return true;
+  }
+
+  void UnlockMouse() override {
+    host_->LostMouseLock();
+    mouse_locked_ = false;
+  }
+
+  bool IsMouseLocked() override { return mouse_locked_; }
+
+  bool HasFocus() const override { return true; }
+
+  RenderWidgetHostImpl* host_;
+};
+
+}  // namespace
+
+void InstallCreateHooksForPointerLockBrowserTests() {
+  WebContentsViewMac::InstallCreateHookForTests(
+      [](RenderWidgetHost* host,
+         bool is_guest_view_hack) -> RenderWidgetHostViewMac* {
+        return new MockRenderWidgetHostView(host, is_guest_view_hack);
+      });
+}
+
+}  // namespace content