gpu: Use mojom API for recording log messages to the host.

services/ui/ws/gpu_host.h

Index: services/ui/ws/gpu_host.h
diff --git a/services/ui/ws/gpu_host.h b/services/ui/ws/gpu_host.h
index b937266a5cc7136b079d451ae36d421b6797c376..d967b06cdce37634c8a4c375ed33a94042e0f851 100644
--- a/services/ui/ws/gpu_host.h
+++ b/services/ui/ws/gpu_host.h
@@ -57,6 +57,9 @@ class GpuHost : public mojom::GpuHost {
   void StoreShaderToDisk(int32_t client_id,
                          const std::string& key,
                          const std::string& shader) override;
+  void RecordLogMessage(int32_t severity,
+                        const std::string& header,
+                        const std::string& message) override;
 
   GpuHostDelegate* const delegate_;
   int32_t next_client_id_;