Add PPAPI decryptor interfaces.

ppapi/cpp/dev/content_decryptor_dev.h

Index: ppapi/cpp/dev/content_decryptor_dev.h
diff --git a/ppapi/cpp/dev/content_decryptor_dev.h b/ppapi/cpp/dev/content_decryptor_dev.h
new file mode 100644
index 0000000000000000000000000000000000000000..7dacbcca1f58e9515cdd403cdce0c0ca0e1b8188
--- /dev/null
+++ b/ppapi/cpp/dev/content_decryptor_dev.h
@@ -0,0 +1,73 @@
+// Copyright (c) 2012 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.
+
+#ifndef PPAPI_CPP_DEV_CONTENT_DECRYPTOR_DEV_H_
+#define PPAPI_CPP_DEV_CONTENT_DECRYPTOR_DEV_H_
+
+#include "ppapi/c/dev/ppb_content_decryptor_dev.h"
+#include "ppapi/c/dev/ppp_content_decryptor_dev.h"
+#include "ppapi/cpp/instance_handle.h"
+#include "ppapi/cpp/var.h"
+#include "ppapi/cpp/dev/buffer_dev.h"
+
+namespace pp {
+
+class Instance;
+
+class ContentDecryptor_Dev {
+ public:
+  explicit ContentDecryptor_Dev(Instance* instance);
+  virtual ~ContentDecryptor_Dev();
+
+  // PPP_ContentDecryptor_Dev functions exposed as virtual functions
+  // for you to override.
+  virtual bool GenerateKeyRequest(PP_Var key_system,      // String.

[dmichael (off chromium), 2012/08/08 22:24:02]

As noted before, you should use a C++ version of a type wherever possible.

In this particular case, it's sensible to just use const std::string&.  PP_Var
can go to pp::VarArrayBuffer when you know it's supposed to be an ArrayBuffer.
etc.

[Tom Finegan, 2012/08/09 22:45:17]

Done.

+                                  PP_Var init_data) = 0;  // ArrayBuffer.
+
+  virtual bool AddKey(PP_Var session_id,  // String.
+                      PP_Var key) = 0;    // ArrayBuffer.
+
+  virtual bool CancelKeyRequest(PP_Var session_id) = 0;  // String.
+
+  virtual bool Decrypt(PP_Resource encrypted_block,
+                       uint64_t request_id) = 0;
+
+  virtual bool DecryptAndDecode(PP_Resource encrypted_block,
+                                uint64_t request_id) = 0;
+
+  // PPB_ContentDecryptor_Dev methods for passing data from the decryptor to the
+  // browser.
+  void NeedKey(PP_Var key_system,  // String.
+               PP_Var session_id,  // String.
+               PP_Var init_data);  // ArrayBuffer.
+
+  void KeyAdded(PP_Var key_system,   // String.
+                PP_Var session_id);  // String.
+
+  void KeyMessage(PP_Var key_system,    // String.
+                  PP_Var session_id,    // String.
+                  PP_Resource message,
+                  PP_Var default_url);  // String.
+
+  void KeyError(PP_Var key_system,  // String.
+                PP_Var session_id,  // String.
+                int32_t media_error,
+                int32_t system_error);
+
+  void DeliverBlock(PP_Resource decrypted_block,  // PPB_Buffer.
+                    uint64_t request_id);
+
+  void DeliverFrame(PP_Resource decrypted_frame,  // PPB_Buffer.
+                    uint64_t request_id);
+
+  void DeliverSamples(PP_Resource decrypted_samples,  // PPB_Buffer.
+                      uint64_t request_id);
+
+ private:
+  InstanceHandle associated_instance_;
+};
+
+}  // namespace pp
+
+#endif  // PPAPI_CPP_DEV_CONTENT_DECRYPTOR_DEV_H_