gpu: Introduce separate mojo api for failed initialization.

content/browser/gpu/gpu_process_host.h

Index: content/browser/gpu/gpu_process_host.h
diff --git a/content/browser/gpu/gpu_process_host.h b/content/browser/gpu/gpu_process_host.h
index f867dade50b42bb52423fc14fda004a5ff46ded6..b8201dda5dadd331e30b52f6ac63793a3a71ba83 100644
--- a/content/browser/gpu/gpu_process_host.h
+++ b/content/browser/gpu/gpu_process_host.h
@@ -184,7 +184,9 @@ class GpuProcessHost : public BrowserChildProcessHostDelegate,
   void OnProcessCrashed(int exit_code) override;
 
   // ui::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;