Desktop chrome tab capture-chooseDesktopMedia()

content/public/browser/desktop_media_id.cc

Index: content/public/browser/desktop_media_id.cc
diff --git a/content/public/browser/desktop_media_id.cc b/content/public/browser/desktop_media_id.cc
index 1ec49b7b4de8594b3788e8b3a250ad3bf9164f6c..ef8e3439968e46098a7d2edca3a1be216786b742 100644
--- a/content/public/browser/desktop_media_id.cc
+++ b/content/public/browser/desktop_media_id.cc
@@ -79,7 +79,7 @@ const char kWindowPrefix[] = "window";
 // static
 DesktopMediaID DesktopMediaID::RegisterAuraWindow(DesktopMediaID::Type type,
                                                   aura::Window* window) {
-  DCHECK(type == TYPE_SCREEN || type == TYPE_WINDOW);
+  DCHECK(type == TYPE_SCREEN || type == TYPE_WINDOW || type == TYPE_TAB);
   DCHECK(window);
   DesktopMediaID media_id(type, kNullId);
   media_id.aura_id = AuraWindowRegistry::GetInstance()->RegisterWindow(window);
@@ -93,45 +93,81 @@ aura::Window* DesktopMediaID::GetAuraWindowById(const DesktopMediaID& id) {
 
 #endif  // defined(USE_AURA)
 
+bool DesktopMediaID::operator<(const DesktopMediaID& other) const {
+#if defined(USE_AURA)
+  return std::tie(type, id, aura_id, tab_id) <
+         std::tie(other.type, other.id, other.aura_id, other.tab_id);
+#else
+  return std::tie(type, id, tab_id) < std::tie(other.type, other.id, tab_id);
+#endif
+}
+
+bool DesktopMediaID::operator==(const DesktopMediaID& other) const {
+#if defined(USE_AURA)
+  return type == other.type && id == other.id && aura_id == other.aura_id &&
+         tab_id == other.tab_id;
+#else
+  return type == other.type && id == other.id && tab_id == other.tab_id;
+#endif
+}
+
 // static
+// Input string should in format:
+// for tab: web-contents-media-stream://"render_process_id":"render_process_id"
+// for no tab and aura: screen:"window_id" or window:"window_id"
+// for no tab and no aura: screen:"window_id:aura_id" or
+//                         window:"window_id:aura_id".
 DesktopMediaID DesktopMediaID::Parse(const std::string& str) {
   std::vector<std::string> parts = base::SplitString(
       str, ":", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
 
-#if defined(USE_AURA)
-  if (parts.size() != 3)
-    return DesktopMediaID();
-#else
-  if (parts.size() != 2)
+  if (parts.size() < 2)
     return DesktopMediaID();
-#endif
 
   Type type = TYPE_NONE;
   if (parts[0] == kScreenPrefix) {
     type = TYPE_SCREEN;
   } else if (parts[0] == kWindowPrefix) {
     type = TYPE_WINDOW;
+  } else if (parts[0] == kTabPrefix) {
+    type = TYPE_TAB;
   } else {
     return DesktopMediaID();
   }
 
-  int64 id;
-  if (!base::StringToInt64(parts[1], &id))
+  // Tab type.
+  if (type == TYPE_TAB) {
+    WebContentsMediaCaptureId temp_id = WebContentsMediaCaptureId::Parse(str);
+    return DesktopMediaID(type, 0, temp_id);
+  }
+
+// Screen and window types.
+#if defined(USE_AURA)
+  if (parts.size() != 3)
+    return DesktopMediaID();
+#else
+  if (parts.size() != 2)
+    return DesktopMediaID();
+#endif  // defined(USE_AURA)
+
+  int64 tempid;
+  if (!base::StringToInt64(parts[1], &tempid))
     return DesktopMediaID();
 
-  DesktopMediaID media_id(type, id);
+  DesktopMediaID media_id(type, tempid);
 
 #if defined(USE_AURA)
   int64 aura_id;
   if (!base::StringToInt64(parts[2], &aura_id))
     return DesktopMediaID();
+
   media_id.aura_id = aura_id;
 #endif  // defined(USE_AURA)
 
   return media_id;
 }
 
-std::string DesktopMediaID::ToString() {
+std::string DesktopMediaID::ToString() const {
   std::string prefix;
   switch (type) {
     case TYPE_NONE:
@@ -143,9 +179,13 @@ std::string DesktopMediaID::ToString() {
     case TYPE_WINDOW:
       prefix = kWindowPrefix;
       break;
+    case TYPE_TAB:
+      return tab_id.ToString();
+      break;
   }
   DCHECK(!prefix.empty());
 
+  // Screen and Window types.
   prefix.append(":");
   prefix.append(base::Int64ToString(id));