[Chromecast] Log active URL for navigation

This aids in debugging various crashes that might occur during
navigation.

Bug: internal b/118459412
Test: CQ
Change-Id: Iacb798075dde879bb45a41827b155b96004c2130
Reviewed-on: https://chromium-review.googlesource.com/c/1321150Reviewed-by: Luke Halliwell <halliwell@chromium.org>
Commit-Queue: Sean Topping <seantopping@chromium.org>
Cr-Commit-Position: refs/heads/master@{#605890}

chromecast/common/cast_content_client.cc

@@ -86,6 +86,11 @@ std::string GetUserAgent() {
 CastContentClient::~CastContentClient() {
 }
 
+void CastContentClient::SetActiveURL(const GURL& url, std::string top_origin) {
+  LOG(INFO) << "Active URL: " << url.possibly_invalid_spec() << " for origin '"
+            << top_origin << "'";
+}
+
 void CastContentClient::AddAdditionalSchemes(Schemes* schemes) {
   schemes->standard_schemes.push_back(kChromeResourceScheme);
 #if BUILDFLAG(ENABLE_CHROMECAST_EXTENSIONS)

chromecast/common/cast_content_client.h

@@ -17,6 +17,7 @@ class CastContentClient : public content::ContentClient {
   ~CastContentClient() override;
 
   // content::ContentClient implementation:
+  void SetActiveURL(const GURL& url, std::string top_origin) override;
   void AddAdditionalSchemes(Schemes* schemes) override;
   std::string GetUserAgent() const override;
   base::string16 GetLocalizedString(int message_id) const override;