mustash: enable GPU Compositing in renderer

content/public/common/BUILD.gn

Index: content/public/common/BUILD.gn
diff --git a/content/public/common/BUILD.gn b/content/public/common/BUILD.gn
index 9c1e0f771d49464b6f302489b4f81735726a644a..c5475259db21462b447c75005ddb55fb009be67b 100644
--- a/content/public/common/BUILD.gn
+++ b/content/public/common/BUILD.gn
@@ -65,7 +65,10 @@ source_set("static_switches") {
     "content_switches.cc",
   ]
 
-  public_configs = [ ":static_switches_defines" ]
+  public_configs = [
+    ":mojo_shell_client",

[Fady Samuel, 2015/12/02 16:20:33]

Don't put this in public because consumers of this library may not have this
defined and so it may end up being inconsistent across files.

[Peng, 2015/12/02 16:33:32]

Done.

+    ":static_switches_defines",
+  ]
 }
 
 source_set("common_sources") {
@@ -80,7 +83,10 @@ source_set("common_sources") {
     "//content:content_implementation",
   ]
 
-  public_configs = [ "//v8:external_startup_data" ]
+  public_configs = [
+    "//v8:external_startup_data",
+    ":mojo_shell_client",
+  ]
 
   public_deps = [
     "//content/common",