Makes RenderFrameObserver/RenderViewObserver::OnDestruct pure virtual.

content/shell/renderer/layout_test/layout_test_render_frame_observer.cc

 // Copyright 2013 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/shell/renderer/layout_test/layout_test_render_frame_observer.h"
 
 #include <string>
 
 #include "components/test_runner/web_test_interfaces.h"
 #include "components/test_runner/web_test_runner.h"
@@ skipping 26 matching lines @@
     IPC_MESSAGE_HANDLER(ShellViewMsg_SetTestConfiguration,
                         OnSetTestConfiguration)
     IPC_MESSAGE_HANDLER(ShellViewMsg_SetupSecondaryRenderer,
                         OnSetupSecondaryRenderer)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
 
   return handled;
 }
 
+void LayoutTestRenderFrameObserver::OnDestruct() {
+  delete this;
+}
+
 void LayoutTestRenderFrameObserver::OnLayoutDumpRequest() {
   std::string dump =
       LayoutTestRenderThreadObserver::GetInstance()
           ->test_interfaces()
           ->TestRunner()
           ->DumpLayout(render_frame()->GetWebFrame());
   Send(new ShellViewHostMsg_LayoutDumpResponse(routing_id(), dump));
 }
 
 void LayoutTestRenderFrameObserver::OnReplicateTestConfiguration(
     const ShellTestConfiguration& test_config) {
   BlinkTestRunner::Get(render_frame()->GetRenderView())
       ->OnReplicateTestConfiguration(test_config);
 }
 
 void LayoutTestRenderFrameObserver::OnSetTestConfiguration(
     const ShellTestConfiguration& test_config) {
   BlinkTestRunner::Get(render_frame()->GetRenderView())
       ->OnSetTestConfiguration(test_config);
 }
 
 void LayoutTestRenderFrameObserver::OnSetupSecondaryRenderer() {
   BlinkTestRunner::Get(render_frame()->GetRenderView())
       ->OnSetupSecondaryRenderer();
 }
 
 }  // namespace content