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

gpu/command_buffer/client/gles2_implementation.cc

Index: gpu/command_buffer/client/gles2_implementation.cc
diff --git a/gpu/command_buffer/client/gles2_implementation.cc b/gpu/command_buffer/client/gles2_implementation.cc
index 7708bc129c7aec036cc6186e7ab3d128beec0a79..ca837b3c65584a7c1209cc8be6c914e839053691 100644
--- a/gpu/command_buffer/client/gles2_implementation.cc
+++ b/gpu/command_buffer/client/gles2_implementation.cc
@@ -4103,6 +4103,21 @@ void GLES2Implementation::GetVertexAttribIuiv(
   CheckGLError();
 }
 
+GLenum GLES2Implementation::GetGraphicsResetStatusKHR() {
+  GPU_CLIENT_SINGLE_THREAD_CHECK();
+  GPU_CLIENT_LOG("[" << GetLogPrefix() << "] glGetGraphicsResetStatusKHR()");
+  // If we can't make command buffers then the context is lost.
+  if (gpu_control_->IsGpuChannelLost())
+    return GL_UNKNOWN_CONTEXT_RESET_KHR;
+  // Otherwise, check the command buffer if it is lost.
+  if (helper_->IsContextLost()) {
+    // TODO(danakj): We could GetLastState() off the CommandBuffer and return
+    // the actual reason here if we cared to.

[Ken Russell (switch to Gerrit), 2015/06/08 23:08:22]

It's a little unfortunate that this can't return the GUILTY status any more, but
realistically none of the drivers out there were reporting guilty/innocent
contexts with any precision.

[danakj, 2015/06/08 23:09:37]

Ya, that's why I left a todo so someone can track it down and add it if they
care to. For now I think it'd just be extra plumbing/LOC without benefit?

+    return GL_UNKNOWN_CONTEXT_RESET_KHR;
+  }
+  return GL_NO_ERROR;
+}
+
 void GLES2Implementation::Swap() {
   SwapBuffers();
 }