gpu: Introduce separate mojo api for failed initialization.

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 247ff63ce9aaa353a12fe6609deb5443a1f9009c..628726e887cda938d9ee224abe0c3a3fda30dd36 100644
--- a/services/ui/ws/gpu_host.h
+++ b/services/ui/ws/gpu_host.h
@@ -55,7 +55,9 @@ class GpuHost : public mojom::GpuHost {
   void OnBadMessageFromGpu();
 
   // mojom::GpuHost:
-  void DidInitialize(const gpu::GPUInfo& gpu_info) override;
+  void DidInitialize(const gpu::GPUInfo& gpu_info,
+                     const gpu::GpuFeatureInfo& gpu_feature_info) override;
+  void DidFailInitialize() override;
   void DidCreateOffscreenContext(const GURL& url) override;
   void DidDestroyOffscreenContext(const GURL& url) override;
   void DidDestroyChannel(int32_t client_id) override;