gpu: Introduce separate mojo api for failed initialization.

content/browser/gpu/gpu_process_host.cc

Index: content/browser/gpu/gpu_process_host.cc
diff --git a/content/browser/gpu/gpu_process_host.cc b/content/browser/gpu/gpu_process_host.cc
index 4b4a43a375081c960397c40681a6984ff9ca353a..ed864397760767e3824755dd40ef6db72ee94162 100644
--- a/content/browser/gpu/gpu_process_host.cc
+++ b/content/browser/gpu/gpu_process_host.cc
@@ -902,10 +902,16 @@ void GpuProcessHost::OnProcessCrashed(int exit_code) {
       process_->GetTerminationStatus(true /* known_dead */, NULL));
 }
 
-void GpuProcessHost::DidInitialize(const gpu::GPUInfo& gpu_info) {
+void GpuProcessHost::DidInitialize(
+    const gpu::GPUInfo& gpu_info,
+    const gpu::GpuFeatureInfo& gpu_feature_info) {
   // TODO(sad): This should call OnInitialized().
 }
 
+void GpuProcessHost::DidFailInitialize() {
+  // TODO(sad): This should call GpuDataManagerImpl::OnGpuProcessInitFailure().
+}
+
 void GpuProcessHost::DidCreateOffscreenContext(const GURL& url) {
   urls_with_live_offscreen_contexts_.insert(url);
 }