Turn test runner library into an actual component

components/test_runner/test_runner.cc

Index: components/test_runner/test_runner.cc
diff --git a/components/test_runner/test_runner.cc b/components/test_runner/test_runner.cc
index ac596f01c1e179cd73270811e96aafffb03e0ff1..cb84141865b51538f9dfbba1de7988d8315aa6a5 100644
--- a/components/test_runner/test_runner.cc
+++ b/components/test_runner/test_runner.cc
@@ -1781,6 +1781,11 @@ bool TestRunner::ShouldGeneratePixelResults() {
   return generate_pixel_results_;
 }
 
+bool TestRunner::ShouldStayOnPageAfterHandlingBeforeUnload() const {
+  return should_stay_on_page_after_handling_before_unload_;
+}
+
+
 void TestRunner::setShouldGeneratePixelResults(bool value) {
   generate_pixel_results_ = value;
 }
@@ -1885,10 +1890,6 @@ bool TestRunner::isPrinting() const {
   return is_printing_;
 }
 
-bool TestRunner::shouldStayOnPageAfterHandlingBeforeUnload() const {
-  return should_stay_on_page_after_handling_before_unload_;
-}
-
 bool TestRunner::shouldWaitUntilExternalURLLoad() const {
   return wait_until_external_url_load_;
 }