Revert of Enable creation of offscreen contexts which own their backing surface.

gpu/ipc/service/gpu_command_buffer_stub.cc

Index: gpu/ipc/service/gpu_command_buffer_stub.cc
diff --git a/gpu/ipc/service/gpu_command_buffer_stub.cc b/gpu/ipc/service/gpu_command_buffer_stub.cc
index 1ee0cae4bb2a7db7973ff029be344a1f07abba86..3f41a30555095398eacb3ddab053551bfa5bfb3d 100644
--- a/gpu/ipc/service/gpu_command_buffer_stub.cc
+++ b/gpu/ipc/service/gpu_command_buffer_stub.cc
@@ -623,32 +623,7 @@
   decoder_->set_engine(executor_.get());
 
   if (offscreen) {
-    if (init_params.attribs.own_offscreen_surface) {
-      DVLOG(1) << __FUNCTION__ << "Hit the own_offscreen_surface path";
-      use_virtualized_gl_context_ = false;
-      // Currently, we can't separately control alpha channel for surfaces,
-      // it's generally enabled by default except for RGB565 and (on desktop)
-      // smaller-than-32bit formats.
-      //
-      // TODO(klausw): use init_params.attribs.alpha_size here if possible.
-      if (init_params.attribs.depth_size > 0) {
-        surface_format.SetDepthBits(init_params.attribs.depth_size);
-      }
-      if (init_params.attribs.samples > 0) {
-        surface_format.SetSamples(init_params.attribs.samples);
-      }
-      if (init_params.attribs.stencil_size > 0) {
-        surface_format.SetStencilBits(init_params.attribs.stencil_size);
-      }
-      surface_ = gl::init::CreateOffscreenGLSurfaceWithFormat(
-          gfx::Size(), surface_format);
-      if (!surface_) {
-        DLOG(ERROR) << "Failed to create surface.";
-        return false;
-      }
-    } else {
-      surface_ = default_surface;
-    }
+    surface_ = default_surface;
   } else {
     surface_ = ImageTransportSurface::CreateNativeSurface(
         AsWeakPtr(), surface_handle_, surface_format);