Move test runner to a component

components/test_runner/mock_constraints.h

Index: components/test_runner/mock_constraints.h
diff --git a/content/shell/renderer/test_runner/mock_constraints.h b/components/test_runner/mock_constraints.h
similarity index 70%
rename from content/shell/renderer/test_runner/mock_constraints.h
rename to components/test_runner/mock_constraints.h
index fdc20cb83201ac371a78d28debc78538495d29de..510dc4b202428485ba6aed2c9221a48ed13715b2 100644
--- a/content/shell/renderer/test_runner/mock_constraints.h
+++ b/components/test_runner/mock_constraints.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef CONTENT_SHELL_RENDERER_TEST_RUNNER_MOCK_CONSTRAINTS_H_
-#define CONTENT_SHELL_RENDERER_TEST_RUNNER_MOCK_CONSTRAINTS_H_
+#ifndef COMPONENTS_TEST_RUNNER_MOCK_CONSTRAINTS_H_
+#define COMPONENTS_TEST_RUNNER_MOCK_CONSTRAINTS_H_
 
 namespace blink {
 class WebMediaConstraints;
@@ -20,4 +20,4 @@ class MockConstraints {
 
 }  // namespace content
 
-#endif  // CONTENT_SHELL_RENDERER_TEST_RUNNER_MOCK_CONSTRAINTS_H_
+#endif  // COMPONENTS_TEST_RUNNER_MOCK_CONSTRAINTS_H_