Revert of Mandoline UI Process: Update namespaces and file names

components/mus/gles2/gpu_impl.h

Index: components/mus/gles2/gpu_impl.h
diff --git a/components/mus/gles2/gpu_impl.h b/components/mus/gles2/gpu_impl.h
index 6bc1cdb692a00af55e4741afc65692fba5a4ddb1..f18475157c496dd78a1349e3768304036bbcf9e4 100644
--- a/components/mus/gles2/gpu_impl.h
+++ b/components/mus/gles2/gpu_impl.h
@@ -15,7 +15,7 @@
 #include "third_party/mojo/src/mojo/public/cpp/bindings/strong_binding.h"
 #include "ui/mojo/geometry/geometry.mojom.h"
 
-namespace mus {
+namespace gles2 {
 
 class GpuImpl : public mojo::Gpu {
  public:
@@ -33,6 +33,6 @@
   DISALLOW_COPY_AND_ASSIGN(GpuImpl);
 };
 
-}  // namespace mus
+}  // namespace gles2
 
 #endif  // COMPONENTS_MUS_GLES2_GPU_IMPL_H_