Add Promises for EME (Chromium side)

Now that the EME-WD spec has changed to specify promises, implement
them on the Chromium side. They currently get converted back to
events before passing them to blink:: until the blink interface gets
changed.

Additional changes in this CL:
1. Pass a reference to the promise though PPAPI.
2. Roll DEPS for CDM.h to include CDM_5.
3. Update cdm_adapter to use CDM_5 (in addition to existing CDM_4).
4. Change External Clear Key to use CDM_5.
5. Since CDM_5 references sessions by the actual session id (a string,
   web_session_id), switch to using it rather than the previously used
   session_id (which is an integer, and used as a reference).

BUG=358271
TEST=all existing encrypted media layout and browser tests pass

Review URL: https://codereview.chromium.org/265993002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@275656 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 51 insertions, 31 deletions

diff --git a/ppapi/proxy/ppp_content_decryptor_private_proxy.cc b/ppapi/proxy/ppp_content_decryptor_private_proxy.cc
index 1058a2e..eee3871 100644
--- a/ppapi/proxy/ppp_content_decryptor_private_proxy.cc
+++ b/ppapi/proxy/ppp_content_decryptor_private_proxy.cc
@@ -125,9 +125,10 @@ void Initialize(PP_Instance instance,
 }
 
 void CreateSession(PP_Instance instance,
-                   uint32_t session_id,
-                   PP_Var type,
-                   PP_Var init_data) {
+                   uint32_t promise_id,
+                   PP_Var init_data_type,
+                   PP_Var init_data,
+                   PP_SessionType session_type) {
   HostDispatcher* dispatcher = HostDispatcher::GetForInstance(instance);
   if (!dispatcher) {
     NOTREACHED();
@@ -137,13 +138,14 @@ void CreateSession(PP_Instance instance,
   dispatcher->Send(new PpapiMsg_PPPContentDecryptor_CreateSession(
       API_ID_PPP_CONTENT_DECRYPTOR_PRIVATE,
       instance,
-      session_id,
-      SerializedVarSendInput(dispatcher, type),
-      SerializedVarSendInput(dispatcher, init_data)));
+      promise_id,
+      SerializedVarSendInput(dispatcher, init_data_type),
+      SerializedVarSendInput(dispatcher, init_data),
+      session_type));
 }
 
 void LoadSession(PP_Instance instance,
-                 uint32_t session_id,
+                 uint32_t promise_id,
                  PP_Var web_session_id) {
   HostDispatcher* dispatcher = HostDispatcher::GetForInstance(instance);
   if (!dispatcher) {
@@ -154,11 +156,14 @@ void LoadSession(PP_Instance instance,
   dispatcher->Send(new PpapiMsg_PPPContentDecryptor_LoadSession(
       API_ID_PPP_CONTENT_DECRYPTOR_PRIVATE,
       instance,
-      session_id,
+      promise_id,
       SerializedVarSendInput(dispatcher, web_session_id)));
 }
 
-void UpdateSession(PP_Instance instance, uint32_t session_id, PP_Var response) {
+void UpdateSession(PP_Instance instance,
+                   uint32_t promise_id,
+                   PP_Var web_session_id,
+                   PP_Var response) {
   HostDispatcher* dispatcher = HostDispatcher::GetForInstance(instance);
   if (!dispatcher) {
     NOTREACHED();
@@ -168,11 +173,14 @@ void UpdateSession(PP_Instance instance, uint32_t session_id, PP_Var response) {
   dispatcher->Send(new PpapiMsg_PPPContentDecryptor_UpdateSession(
       API_ID_PPP_CONTENT_DECRYPTOR_PRIVATE,
       instance,
-      session_id,
+      promise_id,
+      SerializedVarSendInput(dispatcher, web_session_id),
       SerializedVarSendInput(dispatcher, response)));
 }
 
-void ReleaseSession(PP_Instance instance, uint32_t session_id) {
+void ReleaseSession(PP_Instance instance,
+                    uint32_t promise_id,
+                    PP_Var web_session_id) {
   HostDispatcher* dispatcher = HostDispatcher::GetForInstance(instance);
   if (!dispatcher) {
     NOTREACHED();
@@ -180,7 +188,10 @@ void ReleaseSession(PP_Instance instance, uint32_t session_id) {
   }
 
   dispatcher->Send(new PpapiMsg_PPPContentDecryptor_ReleaseSession(
-      API_ID_PPP_CONTENT_DECRYPTOR_PRIVATE, instance, session_id));
+      API_ID_PPP_CONTENT_DECRYPTOR_PRIVATE,
+      instance,
+      promise_id,
+      SerializedVarSendInput(dispatcher, web_session_id)));
 }
 
 void Decrypt(PP_Instance instance,
@@ -455,50 +466,59 @@ void PPP_ContentDecryptor_Private_Proxy::OnMsgInitialize(
 
 void PPP_ContentDecryptor_Private_Proxy::OnMsgCreateSession(
     PP_Instance instance,
-    uint32_t session_id,
-    SerializedVarReceiveInput type,
-    SerializedVarReceiveInput init_data) {
+    uint32_t promise_id,
+    SerializedVarReceiveInput init_data_type,
+    SerializedVarReceiveInput init_data,
+    PP_SessionType session_type) {
   if (ppp_decryptor_impl_) {
-    CallWhileUnlocked(ppp_decryptor_impl_->CreateSession,
-                      instance,
-                      session_id,
-                      ExtractReceivedVarAndAddRef(dispatcher(), &type),
-                      ExtractReceivedVarAndAddRef(dispatcher(), &init_data));
+    CallWhileUnlocked(
+        ppp_decryptor_impl_->CreateSession,
+        instance,
+        promise_id,
+        ExtractReceivedVarAndAddRef(dispatcher(), &init_data_type),
+        ExtractReceivedVarAndAddRef(dispatcher(), &init_data),
+        session_type);
   }
 }
 
 void PPP_ContentDecryptor_Private_Proxy::OnMsgLoadSession(
     PP_Instance instance,
-    uint32_t session_id,
+    uint32_t promise_id,
     SerializedVarReceiveInput web_session_id) {
   if (ppp_decryptor_impl_) {
     CallWhileUnlocked(
         ppp_decryptor_impl_->LoadSession,
         instance,
-        session_id,
+        promise_id,
         ExtractReceivedVarAndAddRef(dispatcher(), &web_session_id));
   }
 }
 
 void PPP_ContentDecryptor_Private_Proxy::OnMsgUpdateSession(
     PP_Instance instance,
-    uint32_t session_id,
+    uint32_t promise_id,
+    SerializedVarReceiveInput web_session_id,
     SerializedVarReceiveInput response) {
   if (ppp_decryptor_impl_) {
-    CallWhileUnlocked(ppp_decryptor_impl_->UpdateSession,
-                      instance,
-                      session_id,
-                      ExtractReceivedVarAndAddRef(dispatcher(), &response));
+    CallWhileUnlocked(
+        ppp_decryptor_impl_->UpdateSession,
+        instance,
+        promise_id,
+        ExtractReceivedVarAndAddRef(dispatcher(), &web_session_id),
+        ExtractReceivedVarAndAddRef(dispatcher(), &response));
   }
 }
 
 void PPP_ContentDecryptor_Private_Proxy::OnMsgReleaseSession(
     PP_Instance instance,
-    uint32_t session_id) {
+    uint32_t promise_id,
+    SerializedVarReceiveInput web_session_id) {
   if (ppp_decryptor_impl_) {
-    CallWhileUnlocked(ppp_decryptor_impl_->ReleaseSession,
-                      instance,
-                      session_id);
+    CallWhileUnlocked(
+        ppp_decryptor_impl_->ReleaseSession,
+        instance,
+        promise_id,
+        ExtractReceivedVarAndAddRef(dispatcher(), &web_session_id));
   }
 }