DCHECK if shader compilation fails that it's due to context loss.

gpu/command_buffer/client/gles2_interface.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef GPU_COMMAND_BUFFER_CLIENT_GLES2_INTERFACE_H_
 #define GPU_COMMAND_BUFFER_CLIENT_GLES2_INTERFACE_H_
 
 #include <GLES2/gl2.h>
 
 #include "base/compiler_specific.h"
 
 extern "C" typedef struct _ClientBuffer* ClientBuffer;
 
 namespace gpu {
 namespace gles2 {
 
 // This class is the interface for all client side GL functions.
 class GLES2Interface {
  public:
   GLES2Interface() {}
   virtual ~GLES2Interface() {}
 
   // Include the auto-generated part of this class. We split this because
   // it means we can easily edit the non-auto generated parts right here in
   // this file instead of having to edit some template or the code generator.
   #include "gpu/command_buffer/client/gles2_interface_autogen.h"
+
+  // This method is implemented entirely on the client side by checking for
+  // errors.
+  virtual GLboolean IsContextLost() = 0;

[danakj, 2015/06/08 20:57:10]

I am pretty sure putting this method here is wrong. In fact mojo code is
including mojo_gles2_impl_autogen.h directly, so this just doesn't work unless I
add indirection like we use elsewhere.

But I didn't see how to add this via the autogen scripts without adding it to
the cmd_buffer_functions.txt file, and we don't need a glIsContextLost()
function, right?

[piman, 2015/06/08 21:01:57]

I suppose what we'd want to add to GLES2Interface is a
glGetGraphicsResetStatusKHR from
https://www.opengl.org/registry/specs/KHR/robustness.txt


It can be purely implemented without going to the GPU process, so that's why
adding it to cmd_buffer_functions.txt feels like overkill (we don't actually
need that command in the command buffer), but if not doing so requires massive
amounts of hackery, then maybe we can just add it and noop the decoder side.

 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_CLIENT_GLES2_INTERFACE_H_