Pull gpu CmdBuf service/client shared GpuMemoryBuffer code to common

mojo/gles2/BUILD.gn

Index: mojo/gles2/BUILD.gn
diff --git a/mojo/gles2/BUILD.gn b/mojo/gles2/BUILD.gn
index 705a8ebd274341c31279fceae532b5277b86402c..8ab33f24aefe29746f8c4d7d0efbb49c6c45a241 100644
--- a/mojo/gles2/BUILD.gn
+++ b/mojo/gles2/BUILD.gn
@@ -55,9 +55,5 @@ component("gles2") {
     "//mojo/public/cpp/system",
   ]
 
-  if (!is_component_build) {
-    deps += [ "//gpu/command_buffer/service" ]
-  }
-
   include_dirs = [ ".." ]
 }