Add the Snapshot interface

snapshot/cpu_architecture.h

Index: snapshot/cpu_architecture.h
diff --git a/snapshot/cpu_architecture.h b/snapshot/cpu_architecture.h
new file mode 100644
index 0000000000000000000000000000000000000000..208e98f275f2b0b086cefec11d581fa2db8efb76
--- /dev/null
+++ b/snapshot/cpu_architecture.h
@@ -0,0 +1,39 @@
+// Copyright 2014 The Crashpad Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef CRASHPAD_SNAPSHOT_SNAPSHOT_CPU_ARCHITECTURE_H_
+#define CRASHPAD_SNAPSHOT_SNAPSHOT_CPU_ARCHITECTURE_H_
+
+namespace crashpad {
+
+//! \brief A system’s CPU architecture.
+//!
+//! This can be used to represent the CPU architecture of an entire system
+//! as in SystemSnapshot::CPUArchitecture(). It can also be used to represent
+//! the architecture of a CPUContext structure in its CPUContext::architecture
+//! field without reference to external data.
+enum CPUArchitecture {
+  //! \brief The CPU architecture is unknown.
+  kCPUArchitectureUnknown = 0,
+
+  //! \brief 32-bit x86.
+  kCPUArchitectureX86,
+
+  //! \brief x86_64.
+  kCPUArchitectureX86_64,
+};
+
+}  // namespace crashpad
+
+#endif  // CRASHPAD_SNAPSHOT_SNAPSHOT_CPU_ARCHITECTURE_H_