Expose GLES2Interface to blink, and delete isContextLost() from WGC3D.

gpu/blink/webgraphicscontext3d_impl.cc

Index: gpu/blink/webgraphicscontext3d_impl.cc
diff --git a/gpu/blink/webgraphicscontext3d_impl.cc b/gpu/blink/webgraphicscontext3d_impl.cc
index 64a9f96336a2baef13741b1a0dc6fa5c8f9f6494..d260e942c536192f2c29d1c3aeee56eb208548a8 100644
--- a/gpu/blink/webgraphicscontext3d_impl.cc
+++ b/gpu/blink/webgraphicscontext3d_impl.cc
@@ -1216,14 +1216,14 @@ void WebGraphicsContext3DImpl::waitSync(WGC3Dsync sync,
   gl_->WaitSync(reinterpret_cast<GLsync>(sync), flags, timeout);
 }
 
-bool WebGraphicsContext3DImpl::isContextLost() {
-  return getGraphicsResetStatusARB() != GL_NO_ERROR;
-}
-
 blink::WGC3Denum WebGraphicsContext3DImpl::getGraphicsResetStatusARB() {
   return gl_->GetGraphicsResetStatusKHR();
 }
 
+::gpu::gles2::GLES2Interface* WebGraphicsContext3DImpl::getGLES2Interface() {
+  return gl_;
+}
+
 ::gpu::gles2::GLES2ImplementationErrorMessageCallback*
     WebGraphicsContext3DImpl::getErrorMessageCallback() {
   if (!client_error_message_callback_) {