base: Remove the string logging from CHECK().

content/browser/frame_host/render_frame_host_impl.cc

Index: content/browser/frame_host/render_frame_host_impl.cc
diff --git a/content/browser/frame_host/render_frame_host_impl.cc b/content/browser/frame_host/render_frame_host_impl.cc
index 34c8572c4391e87f2198abd6d78498ecbe4be1c4..fd976cb290fdc67b62244e921fcc32a6a3de553f 100644
--- a/content/browser/frame_host/render_frame_host_impl.cc
+++ b/content/browser/frame_host/render_frame_host_impl.cc
@@ -1955,12 +1955,10 @@ void RenderFrameHostImpl::OnAccessibilityEvents(
                 browser_accessibility_manager_->SnapshotAXTreeForTesting()));
           } else {
             ax_tree_for_testing_.reset(new ui::AXTree());
-            CHECK(ax_tree_for_testing_->Unserialize(detail.update))
-                << ax_tree_for_testing_->error();
+            CHECK(ax_tree_for_testing_->Unserialize(detail.update));
           }
         } else {
-          CHECK(ax_tree_for_testing_->Unserialize(detail.update))
-              << ax_tree_for_testing_->error();
+          CHECK(ax_tree_for_testing_->Unserialize(detail.update));
         }
         accessibility_testing_callback_.Run(this, detail.event_type, detail.id);
       }