Let content embedders register in-process media service.

chrome/browser/chrome_content_browser_client.cc

Index: chrome/browser/chrome_content_browser_client.cc
diff --git a/chrome/browser/chrome_content_browser_client.cc b/chrome/browser/chrome_content_browser_client.cc
index b3cdde7832d671880af6354305c8b316b48183f1..a84c4ee49a0a5a73bc853b21efe90f4a633afec4 100644
--- a/chrome/browser/chrome_content_browser_client.cc
+++ b/chrome/browser/chrome_content_browser_client.cc
@@ -294,6 +294,10 @@
 #include "chrome/browser/chrome_browser_main_extra_parts_exo.h"
 #endif
 
+#if defined(ENABLE_MOJO_MEDIA_IN_BROWSER_PROCESS)
+#include "media/mojo/services/mojo_media_application.h"
+#endif
+
 using base::FileDescriptor;
 using blink::WebWindowFeatures;
 using content::AccessTokenStore;
@@ -2656,6 +2660,14 @@ void ChromeContentBrowserClient::RegisterRenderFrameMojoServices(
 #endif  // !defined(OS_ANDROID) && !defined(OS_IOS)
 }
 
+void ChromeContentBrowserClient::RegisterInProcessMojoApplications(
+    StaticMojoApplicationMap* apps) {
+#if (ENABLE_MOJO_MEDIA_IN_BROWSER_PROCESS)
+  apps->insert(std::make_pair(
+      GURL("mojo:media"), base::Bind(&media::MojoMediaApplication::CreateApp)));
+#endif
+}
+
 void ChromeContentBrowserClient::RegisterOutOfProcessMojoApplications(
       OutOfProcessMojoApplicationMap* apps) {
 #if defined(ENABLE_MOJO_MEDIA_IN_UTILITY_PROCESS)