media: Support MojoRendererService in the browser process.

content/renderer/BUILD.gn

Index: content/renderer/BUILD.gn
diff --git a/content/renderer/BUILD.gn b/content/renderer/BUILD.gn
index dd6b153de24595013fa3eeec92c7bd0ed80a3e19..f7259aa97491d61724ee5f34bb4a8d48a62ab848 100644
--- a/content/renderer/BUILD.gn
+++ b/content/renderer/BUILD.gn
@@ -187,4 +187,12 @@ source_set("renderer") {
       "media/crypto/renderer_cdm_manager.h",
     ]
   }
+
+  if (enable_media_mojo_renderer) {
+    sources += [
+      "media/media_renderer_service_provider.cc",
+      "media/media_renderer_service_provider.h",
+    ]
+    deps += [ "//media/mojo/services:renderer_proxy" ]
+  }
 }