Extract WebFrameClient implementation out of WebTestProxyBase.

components/test_runner/test_common.h

Index: components/test_runner/test_common.h
diff --git a/components/test_runner/test_common.h b/components/test_runner/test_common.h
index 429f96916c392b53351f59c87528cc192b6eab02..d1e758b43b6f7eecc3a4bd16ffc3f9e139409c23 100644
--- a/components/test_runner/test_common.h
+++ b/components/test_runner/test_common.h
@@ -8,6 +8,9 @@
 #include <string>
 
 #include "components/test_runner/test_runner_export.h"
+#include "third_party/WebKit/public/web/WebNavigationPolicy.h"
+
+class GURL;
 
 namespace test_runner {
 
@@ -21,6 +24,10 @@ inline bool IsNotASCIIAlpha(char ch) {
 
 TEST_RUNNER_EXPORT std::string NormalizeLayoutTestURL(const std::string& url);
 
+std::string URLDescription(const GURL& url);
+const char* WebNavigationPolicyToString(
+    const blink::WebNavigationPolicy& policy);
+
 // Tests which depend on Blink must call this function on the main thread
 // before creating/calling any Blink objects/APIs.
 TEST_RUNNER_EXPORT void EnsureBlinkInitialized();