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

mojo/gpu/mojo_gles2_impl_autogen.h

Index: mojo/gpu/mojo_gles2_impl_autogen.h
diff --git a/mojo/gpu/mojo_gles2_impl_autogen.h b/mojo/gpu/mojo_gles2_impl_autogen.h
index 8b242d76fcbf58039e3880d946b3f72480e88cac..4e079787696d6864779439b0a9fd4bdbcb52f4df 100644
--- a/mojo/gpu/mojo_gles2_impl_autogen.h
+++ b/mojo/gpu/mojo_gles2_impl_autogen.h
@@ -772,6 +772,7 @@ class MojoGLES2Impl : public gpu::gles2::GLES2Interface {
                                     GLfloat uv_width,
                                     GLfloat uv_height) override;
   void SwapInterval(GLint interval) override;
+  GLenum GetGraphicsResetStatusKHR() override;
   void MatrixLoadfCHROMIUM(GLenum matrixMode, const GLfloat* m) override;
   void MatrixLoadIdentityCHROMIUM(GLenum matrixMode) override;
   void BlendBarrierKHR() override;