gpu: Use mojom API for getting video memory usage.

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 870993b306b7bd7a4e4f9659383e78866a560f92..68ad9ebf55b41a2fe4cc87c9a957c4fc32461485 100644
--- a/content/browser/gpu/gpu_process_host.cc
+++ b/content/browser/gpu/gpu_process_host.cc
@@ -196,6 +196,14 @@ void SendGpuProcessMessage(GpuProcessHost::GpuProcessKind kind,
   }
 }
 
+void RunCallbackOnIO(GpuProcessHost::GpuProcessKind kind,
+                     bool force_create,
+                     const base::Callback<void(GpuProcessHost*)>& callback) {
+  GpuProcessHost* host = GpuProcessHost::Get(kind, force_create);
+  if (host)
+    callback.Run(host);
+}
+
 #if defined(USE_OZONE)
 void SendGpuProcessMessageByHostId(int host_id, IPC::Message* message) {
   GpuProcessHost* host = GpuProcessHost::FromID(host_id);
@@ -427,6 +435,16 @@ void GpuProcessHost::SendOnIO(GpuProcessKind kind,
   }
 }
 
+// static
+void GpuProcessHost::CallOnIO(
+    GpuProcessKind kind,
+    bool force_create,
+    const base::Callback<void(GpuProcessHost*)>& callback) {
+  BrowserThread::PostTask(
+      BrowserThread::IO, FROM_HERE,
+      base::Bind(&RunCallbackOnIO, kind, force_create, callback));
+}
+
 service_manager::InterfaceProvider* GpuProcessHost::GetRemoteInterfaces() {
   return process_->child_connection()->GetRemoteInterfaces();
 }