Establish MojoChildConnection from BrowserChildProcessHostImpl

content/common/mojo/constants.cc

Index: content/common/mojo/constants.cc
diff --git a/content/common/mojo/constants.cc b/content/common/mojo/constants.cc
index 2f776b7bf8e3cb1c1e2ce89b7b58a596d1ec6cbe..f78fab58b8dca17191cede0e7fbd0fd360a1a72e 100644
--- a/content/common/mojo/constants.cc
+++ b/content/common/mojo/constants.cc
@@ -16,6 +16,11 @@ const char kBrowserMojoApplicationName[] = "exe:content_browser";
 // src/content/public/app/mojo/content_gpu_manifest.json.
 const char kGpuMojoApplicationName[] = "exe:content_gpu";
 
+// The default application name used to identify plugin processes when
+// connecting them to the shell. This must match the name in
+// src/content/public/app/mojo/content_plugin_manifest.json.
+const char kPluginMojoApplicationName[] = "exe:content_plugin";
+
 // The default application name used to identify render processes when
 // connecting them to the shell. This must match the name in
 // src/content/public/app/mojo/content_renderer_manifest.json.