Replicating LayoutDumpFlags across OOPIFs.

components/test_runner/web_test_delegate.h

Index: components/test_runner/web_test_delegate.h
diff --git a/components/test_runner/web_test_delegate.h b/components/test_runner/web_test_delegate.h
index ce757db8ddce8984237051489ea3817be25838bf..f43ef13c6c162b90b969f342cf1fe90dc5638cb1 100644
--- a/components/test_runner/web_test_delegate.h
+++ b/components/test_runner/web_test_delegate.h
@@ -17,6 +17,10 @@
 
 #define WEBTESTRUNNER_NEW_HISTORY_CAPTURE
 
+namespace base {
+class DictionaryValue;
+}
+
 namespace blink {
 class WebDeviceMotionData;
 class WebDeviceOrientationData;
@@ -212,6 +216,10 @@ class WebTestDelegate {
   // Sets the POSIX locale of the current process.
   virtual void SetLocale(const std::string& locale) = 0;
 
+  // Invoked when layout dump flags change.
+  virtual void OnLayoutDumpFlagsChanged(
+      const base::DictionaryValue& changed_values) = 0;
+
   // Invoked when the test finished.
   virtual void TestFinished() = 0;