IPC->mojo of audio_renderer_host

mojo/edk/system/core.cc

Index: mojo/edk/system/core.cc
diff --git a/mojo/edk/system/core.cc b/mojo/edk/system/core.cc
index d2a421ebeeee474cde11153c9f339cc1f8bac05d..61ed03486c4957b2932324497592ac0a93b430f4 100644
--- a/mojo/edk/system/core.cc
+++ b/mojo/edk/system/core.cc
@@ -473,21 +473,18 @@ MojoResult Core::AllocMessage(uint32_t num_bytes,
                               uint32_t num_handles,
                               MojoAllocMessageFlags flags,
                               MojoMessageHandle* message) {
-  if (!message)
-    return MOJO_RESULT_INVALID_ARGUMENT;
+  DCHECK(message);
 
   if (num_handles == 0) {  // Fast path: no handles.
     std::unique_ptr<MessageForTransit> msg;
     MojoResult rv = MessageForTransit::Create(&msg, num_bytes, nullptr, 0);
-    if (rv != MOJO_RESULT_OK)
-      return rv;
+    DCHECK(rv == MOJO_RESULT_OK) << rv;
 
     *message = reinterpret_cast<MojoMessageHandle>(msg.release());
     return MOJO_RESULT_OK;
   }
 
-  if (!handles)
-    return MOJO_RESULT_INVALID_ARGUMENT;
+  DCHECK(handles);
 
   if (num_handles > kMaxHandlesPerMessage)
     return MOJO_RESULT_RESOURCE_EXHAUSTED;
@@ -496,10 +493,7 @@ MojoResult Core::AllocMessage(uint32_t num_bytes,
   {
     base::AutoLock lock(handles_lock_);
     MojoResult rv = handles_.BeginTransit(handles, num_handles, &dispatchers);
-    if (rv != MOJO_RESULT_OK) {
-      handles_.CancelTransit(dispatchers);
-      return rv;
-    }
+    DCHECK(rv == MOJO_RESULT_OK) << rv;
   }
   DCHECK_EQ(num_handles, dispatchers.size());
 
@@ -517,6 +511,7 @@ MojoResult Core::AllocMessage(uint32_t num_bytes,
     }
   }
 
+  DCHECK(rv == MOJO_RESULT_OK) << rv;
   return rv;
 }