Cast: Add JS API to get raw events logs from cast extension.

chrome/browser/extensions/cast_streaming_apitest.cc

Index: chrome/browser/extensions/cast_streaming_apitest.cc
diff --git a/chrome/browser/extensions/cast_streaming_apitest.cc b/chrome/browser/extensions/cast_streaming_apitest.cc
index a1e2ab0c213d890719f8e17d3b33a46852ea4183..04ef6770c2a9914603dcc63736e85be3f68a5003 100644
--- a/chrome/browser/extensions/cast_streaming_apitest.cc
+++ b/chrome/browser/extensions/cast_streaming_apitest.cc
@@ -24,4 +24,8 @@ IN_PROC_BROWSER_TEST_F(CastStreamingApiTest, Basics) {
   ASSERT_TRUE(RunExtensionSubtest("cast_streaming", "basics.html"));
 }
 
+IN_PROC_BROWSER_TEST_F(CastStreamingApiTest, BadLogging) {
+  ASSERT_TRUE(RunExtensionSubtest("cast_streaming", "bad_logging.html"));
+}
+
 }  // namespace extensions