Rename mojo: to service:

content/public/app/BUILD.gn

Index: content/public/app/BUILD.gn
diff --git a/content/public/app/BUILD.gn b/content/public/app/BUILD.gn
index a875a51d2b98161d0cc30dc1a59d8390854d9c8d..557e3d4c1593d13409643ac808634f9904e61bdd 100644
--- a/content/public/app/BUILD.gn
+++ b/content/public/app/BUILD.gn
@@ -167,7 +167,6 @@ if (is_component_build) {
 }
 
 service_manifest("browser_manifest") {
-  type = "exe"
   name = "content_browser"
   source = "mojo/content_browser_manifest.json"
   packaged_services = [
@@ -181,25 +180,21 @@ service_manifest("browser_manifest") {
 }
 
 service_manifest("gpu_manifest") {
-  type = "exe"
   name = "content_gpu"
   source = "mojo/content_gpu_manifest.json"
 }
 
 service_manifest("plugin_manifest") {
-  type = "exe"
   name = "content_plugin"
   source = "mojo/content_plugin_manifest.json"
 }
 
 service_manifest("renderer_manifest") {
-  type = "exe"
   name = "content_renderer"
   source = "mojo/content_renderer_manifest.json"
 }
 
 service_manifest("utility_manifest") {
-  type = "exe"
   name = "content_utility"
   source = "mojo/content_utility_manifest.json"
 }