Move code in //services/gles2 into namespace gles2

mojo/gles2/gles2_context.h

Index: mojo/gles2/gles2_context.h
diff --git a/mojo/gles2/gles2_context.h b/mojo/gles2/gles2_context.h
index 7dd108553a902064d3f9375c9c398008ca9056e5..092ed746494deb97a141502ca86eb584b939d7d9 100644
--- a/mojo/gles2/gles2_context.h
+++ b/mojo/gles2/gles2_context.h
@@ -21,14 +21,13 @@ class GLES2Implementation;
 }
 }
 
-namespace mojo {
 namespace gles2 {
 
 class GLES2Context : public CommandBufferDelegate,
                      public MojoGLES2ContextPrivate {
  public:
   explicit GLES2Context(const MojoAsyncWaiter* async_waiter,
-                        ScopedMessagePipeHandle command_buffer_handle,
+                        mojo::ScopedMessagePipeHandle command_buffer_handle,
                         MojoGLES2ContextLost lost_callback,
                         void* closure);
   ~GLES2Context() override;
@@ -53,6 +52,5 @@ class GLES2Context : public CommandBufferDelegate,
 };
 
 }  // namespace gles2
-}  // namespace mojo
 
 #endif  // MOJO_GLES2_GLES2_CONTEXT_H_