gpu: Use mojom API for getting video memory usage.

gpu/ipc/common/memory_stats.typemap

Index: gpu/ipc/common/memory_stats.typemap
diff --git a/gpu/ipc/common/memory_stats.typemap b/gpu/ipc/common/memory_stats.typemap
new file mode 100644
index 0000000000000000000000000000000000000000..df882eae59d6904bc844958801c8fe382ce3da97
--- /dev/null
+++ b/gpu/ipc/common/memory_stats.typemap
@@ -0,0 +1,11 @@
+# Copyright 2017 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+mojom = "//gpu/ipc/common/memory_stats.mojom"
+public_headers = [ "//gpu/ipc/common/memory_stats.h" ]
+traits_headers = [ "//gpu/ipc/common/memory_stats_struct_traits.h" ]
+type_mappings = [
+  "gpu.mojom.VideoMemoryProcessStats=gpu::VideoMemoryUsageStats::ProcessStats",
+  "gpu.mojom.VideoMemoryUsageStats=gpu::VideoMemoryUsageStats",
+]