OOPIF support for testRunner.dumpAsText and similar layout dumps.

components/test_runner/test_runner.h

Index: components/test_runner/test_runner.h
diff --git a/components/test_runner/test_runner.h b/components/test_runner/test_runner.h
index 372aff951b52469a1a8bddad0bec4fa702f7ba5b..a7add70f221e57400b84c9db1d0f4e87c56761e3 100644
--- a/components/test_runner/test_runner.h
+++ b/components/test_runner/test_runner.h
@@ -72,6 +72,8 @@ class TestRunner : public WebTestRunner,
   bool ShouldStayOnPageAfterHandlingBeforeUnload() const override;
   bool ShouldDumpAsAudio() const override;
   void GetAudioData(std::vector<unsigned char>* buffer_view) const override;
+  LayoutDumpFlags GetLayoutDumpFlags() override;
+  bool HasCustomTextDump(std::string* custom_text_dump) const override;
   bool ShouldDumpBackForwardList() const override;
   blink::WebContentSettingsClient* GetWebContentSettings() const override;