Track text selection on the browser side (Mac)

content/browser/renderer_host/render_widget_host_view_mac_unittest.mm

 // Copyright (c) 2012 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/renderer_host/render_widget_host_view_mac.h"
 
 #include <Cocoa/Cocoa.h>
 #include <stddef.h>
 #include <stdint.h>
 #include <tuple>
@@ skipping 234 matching lines @@
 
   void SetUp() override {
     RenderViewHostImplTestHarness::SetUp();
     // TestRenderViewHost's destruction assumes that its view is a
     // TestRenderWidgetHostView, so store its view and reset it back to the
     // stored view in |TearDown()|.
     old_rwhv_ = rvh()->GetWidget()->GetView();
 
     // Owned by its |cocoa_view()|, i.e. |rwhv_cocoa_|.
     rwhv_mac_ = new RenderWidgetHostViewMac(rvh()->GetWidget(), false);
+    RenderWidgetHostImpl::From(rvh()->GetWidget())->SetView(rwhv_mac_);
+
     rwhv_cocoa_.reset([rwhv_mac_->cocoa_view() retain]);
   }
   void TearDown() override {
     // Make sure the rwhv_mac_ is gone once the superclass's |TearDown()| runs.
     rwhv_cocoa_.reset();
     RecycleAndWait();
 
     // See comment in SetUp().
     test_rvh()->GetWidget()->SetView(
         static_cast<RenderWidgetHostViewBase*>(old_rwhv_));
@@ skipping 1003 matching lines @@
   // Repeat for the tab's view.
   [rwhv_cocoa_ setMarkedText:text
                selectedRange:selectedRange
             replacementRange:replacementRange];
   EXPECT_TRUE([rwhv_cocoa_ hasMarkedText]);
   rwhv_mac_->ImeCancelComposition();
   EXPECT_FALSE([rwhv_cocoa_ hasMarkedText]);
 }
 
 }  // namespace content