Revert of Make lost context and error message callbacks on GpuControl go to client

mojo/gles2/gles2_context.cc

Index: mojo/gles2/gles2_context.cc
diff --git a/mojo/gles2/gles2_context.cc b/mojo/gles2/gles2_context.cc
index 58b86bd90d9d8e9d494b0f4c680c606d9e86a0fd..90ba14e8c957a8d4d5edce7ca41098126a1d0f92 100644
--- a/mojo/gles2/gles2_context.cc
+++ b/mojo/gles2/gles2_context.cc
@@ -28,7 +28,7 @@
                            mojo::ScopedMessagePipeHandle command_buffer_handle,
                            MojoGLES2ContextLost lost_callback,
                            void* closure)
-    : command_buffer_(attribs, std::move(command_buffer_handle)),
+    : command_buffer_(this, attribs, std::move(command_buffer_handle)),
       lost_callback_(lost_callback),
       closure_(closure) {}
 
@@ -57,18 +57,12 @@
                                           lose_context_when_out_of_memory,
                                           support_client_side_arrays,
                                           &command_buffer_));
-  if (!implementation_->Initialize(kDefaultStartTransferBufferSize,
-                                   kDefaultMinTransferBufferSize,
-                                   kDefaultMaxTransferBufferSize,
-                                   gpu::gles2::GLES2Implementation::kNoLimit))
-    return false;
-  implementation_->SetLostContextCallback(
-      base::Bind(&GLES2Context::OnLostContext, base::Unretained(this)));
-  return true;
+  return implementation_->Initialize(kDefaultStartTransferBufferSize,
+                                     kDefaultMinTransferBufferSize,
+                                     kDefaultMaxTransferBufferSize,
+                                     gpu::gles2::GLES2Implementation::kNoLimit);
 }
 
-void GLES2Context::OnLostContext() {
-  lost_callback_(closure_);
-}
+void GLES2Context::ContextLost() { lost_callback_(closure_); }
 
 }  // namespace gles2