Dump inspector protocol traffic for tests starting with inspector/elements/styles

LayoutTests/http/tests/inspector/inspector-test.js

Index: LayoutTests/http/tests/inspector/inspector-test.js
diff --git a/LayoutTests/http/tests/inspector/inspector-test.js b/LayoutTests/http/tests/inspector/inspector-test.js
index 941cfd8c1b7c014201b43f4a9dca4cda36e984ec..72274343bd42604d5a159bd2289a5f5e2a143238 100644
--- a/LayoutTests/http/tests/inspector/inspector-test.js
+++ b/LayoutTests/http/tests/inspector/inspector-test.js
@@ -972,6 +972,9 @@ function runTest(enableWatchDogWhileDebugging)
             }
         }
 
+        if (testPath.startsWith("LayoutTests/inspector/elements/styles"))
+            InspectorTest.startDumpingProtocolMessages();
+
         // 3. Run test function.
         Promise.all(promises).then(function() {
             if (lastLoadedPanel)