[Media Router] Handle multiple Presentation URLs when creating routes

chrome/browser/media/router/media_source_helper.cc

Index: chrome/browser/media/router/media_source_helper.cc
diff --git a/chrome/browser/media/router/media_source_helper.cc b/chrome/browser/media/router/media_source_helper.cc
index 2365cdd9caa0a19eab37a22a437605b513bf66fe..7c618b98484f291892191195998c60b5550a704d 100644
--- a/chrome/browser/media/router/media_source_helper.cc
+++ b/chrome/browser/media/router/media_source_helper.cc
@@ -22,7 +22,8 @@ constexpr char kTabMediaUrnFormat[] = "urn:x-org.chromium.media:source:tab:%d";
 constexpr char kDesktopMediaUrn[] = "urn:x-org.chromium.media:source:desktop";
 constexpr char kTabRemotingUrnFormat[] =
     "urn:x-org.chromium.media:source:tab_content_remoting:%d";
-
+constexpr char kCastPresentationUrlDomain[] = "google.com";
+constexpr char kCastPresentationUrlPath[] = "/cast";
 }  // namespace
 
 MediaSource MediaSourceForTab(int tab_id) {
@@ -59,6 +60,17 @@ bool IsMirroringMediaSource(const MediaSource& source) {
          IsTabMirroringMediaSource(source);
 }
 
+bool CanConnectToMediaSource(const MediaSource& source) {
+  // compare host, port, scheme, and path prefix for source.url()
+  if (!source.url().SchemeIs(url::kHttpsScheme) ||
+      !source.url().DomainIs(kCastPresentationUrlDomain) ||
+      (!source.url().has_path() ||
+       source.url().path() != kCastPresentationUrlPath))
+    return false;
+
+  return true;
+}
+
 int TabIdFromMediaSource(const MediaSource& source) {
   int tab_id;
   if (sscanf(source.id().c_str(), kTabMediaUrnFormat, &tab_id) == 1)