Update Android IPC messages to EME WD

content/renderer/media/android/renderer_media_player_manager.cc

Index: content/renderer/media/android/renderer_media_player_manager.cc
diff --git a/content/renderer/media/android/renderer_media_player_manager.cc b/content/renderer/media/android/renderer_media_player_manager.cc
index f94185f5cad643aa7c48b599334265cce960937b..4767b17aaadb8bfcb37d217ef78ddb72987b119b 100644
--- a/content/renderer/media/android/renderer_media_player_manager.cc
+++ b/content/renderer/media/android/renderer_media_player_manager.cc
@@ -12,6 +12,13 @@
 #include "content/renderer/media/android/webmediaplayer_android.h"
 #include "ui/gfx/rect_f.h"
 
+// Maximum sizes for various EME message parameters. These are checks to
+// prevent unnecessarily large messages from being passed around, and the sizes
+// are somewhat arbitrary as the EME specification doesn't specify any limits.
+static const size_t kEmeWebSessionIdMaximum = 512;
+static const size_t kEmeMessageMaximum = 10240;  // 10 KB
+static const size_t kEmeDestinationUrlMaximum = 2048;  // 2 KB
+
 namespace content {
 
 RendererMediaPlayerManager::RendererMediaPlayerManager(RenderView* render_view)
@@ -57,11 +64,11 @@ bool RendererMediaPlayerManager::OnMessageReceived(const IPC::Message& msg) {
     IPC_MESSAGE_HANDLER(MediaPlayerMsg_DidExitFullscreen, OnDidExitFullscreen)
     IPC_MESSAGE_HANDLER(MediaPlayerMsg_DidMediaPlayerPlay, OnPlayerPlay)
     IPC_MESSAGE_HANDLER(MediaPlayerMsg_DidMediaPlayerPause, OnPlayerPause)
-    // TODO(jrummell): Update IPC names for EME WD and add Closed.
-    IPC_MESSAGE_HANDLER(MediaKeysMsg_KeyAdded, OnSessionReady)
-    IPC_MESSAGE_HANDLER(MediaKeysMsg_KeyError, OnSessionError)
-    IPC_MESSAGE_HANDLER(MediaKeysMsg_KeyMessage, OnSessionMessage)
-    IPC_MESSAGE_HANDLER(MediaKeysMsg_SetSessionId, OnSessionCreated)
+    IPC_MESSAGE_HANDLER(MediaKeysMsg_SessionCreated, OnSessionCreated)
+    IPC_MESSAGE_HANDLER(MediaKeysMsg_SessionMessage, OnSessionMessage)
+    IPC_MESSAGE_HANDLER(MediaKeysMsg_SessionReady, OnSessionReady)
+    IPC_MESSAGE_HANDLER(MediaKeysMsg_SessionClosed, OnSessionClosed)
+    IPC_MESSAGE_HANDLER(MediaKeysMsg_SessionError, OnSessionError)
   IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
@@ -233,26 +240,26 @@ void RendererMediaPlayerManager::InitializeCDM(int media_keys_id,
       routing_id(), media_keys_id, uuid, frame_url));
 }
 
-void RendererMediaPlayerManager::GenerateKeyRequest(
+void RendererMediaPlayerManager::CreateSession(
     int media_keys_id,
     uint32 session_id,
     const std::string& type,
     const std::vector<uint8>& init_data) {
-  Send(new MediaKeysHostMsg_GenerateKeyRequest(
+  Send(new MediaKeysHostMsg_CreateSession(
       routing_id(), media_keys_id, session_id, type, init_data));
 }
 
-void RendererMediaPlayerManager::AddKey(int media_keys_id,
-                                        uint32 session_id,
-                                        const std::vector<uint8>& key,
-                                        const std::vector<uint8>& init_data) {
-  Send(new MediaKeysHostMsg_AddKey(
-      routing_id(), media_keys_id, session_id, key, init_data));
+void RendererMediaPlayerManager::UpdateSession(
+    int media_keys_id,
+    uint32 session_id,
+    const std::vector<uint8>& response) {
+  Send(new MediaKeysHostMsg_UpdateSession(
+      routing_id(), media_keys_id, session_id, response));
 }
 
-void RendererMediaPlayerManager::CancelKeyRequest(int media_keys_id,
-                                                  uint32 session_id) {
-  Send(new MediaKeysHostMsg_CancelKeyRequest(
+void RendererMediaPlayerManager::ReleaseSession(int media_keys_id,
+                                                uint32 session_id) {
+  Send(new MediaKeysHostMsg_ReleaseSession(
       routing_id(), media_keys_id, session_id));
 }
 
@@ -260,6 +267,12 @@ void RendererMediaPlayerManager::OnSessionCreated(
     int media_keys_id,
     uint32 session_id,
     const std::string& web_session_id) {
+  if (web_session_id.length() > kEmeWebSessionIdMaximum) {
+    OnSessionError(
+        media_keys_id, session_id, media::MediaKeys::kUnknownError, 0);
+    return;
+  }
+
   ProxyMediaKeys* media_keys = GetMediaKeys(media_keys_id);
   if (media_keys)
     media_keys->OnSessionCreated(session_id, web_session_id);
@@ -270,6 +283,17 @@ void RendererMediaPlayerManager::OnSessionMessage(
     uint32 session_id,
     const std::vector<uint8>& message,
     const std::string& destination_url) {
+  if (message.size() > kEmeMessageMaximum) {
+    OnSessionError(
+        media_keys_id, session_id, media::MediaKeys::kUnknownError, 0);
+    return;
+  }
+  if (destination_url.length() > kEmeDestinationUrlMaximum) {
+    OnSessionError(
+        media_keys_id, session_id, media::MediaKeys::kUnknownError, 0);
+    return;
+  }
+
   ProxyMediaKeys* media_keys = GetMediaKeys(media_keys_id);
   if (media_keys)
     media_keys->OnSessionMessage(session_id, message, destination_url);