[Presentation API] Add support for multiple URLs in PresentationRequest on Media Router UI side

chrome/browser/media/router/media_source.h

Index: chrome/browser/media/router/media_source.h
diff --git a/chrome/browser/media/router/media_source.h b/chrome/browser/media/router/media_source.h
index 288cb27b7791bdfdca6d04ce345df9aeb64ce604..e4300d8ec337284c4ea9c9739d5ad39d702260d1 100644
--- a/chrome/browser/media/router/media_source.h
+++ b/chrome/browser/media/router/media_source.h
@@ -29,6 +29,8 @@ class MediaSource {
   // Returns true if two MediaSource objects use the same media ID.
   bool Equals(const MediaSource& other) const;
 
+  bool operator==(const MediaSource& other) const;

[mark a. foltz, 2016/08/31 05:18:54]

Why do we need both == and Equals?

[takumif, 2016/09/01 21:09:25]

Got rid of Equals().

+
   // Returns true if a MediaSource is empty or uninitialized.
   bool Empty() const;
 
@@ -42,6 +44,14 @@ class MediaSource {
     }
   };
 
+  // For storing in sets and in maps as keys.
+  struct Compare {
+    bool operator()(const MediaSource& source1,
+                    const MediaSource& source2) const {
+      return source1.id() < source2.id();
+    }
+  };
+
  private:
   MediaSource::Id id_;
 };