media: Support SetCdm() on VideoDecodeAccelerator interface.

content/common/gpu/gpu_messages.h

Index: content/common/gpu/gpu_messages.h
diff --git a/content/common/gpu/gpu_messages.h b/content/common/gpu/gpu_messages.h
index a9c84a4e5399f25a1269693ad8ea3e5c88575cd0..4d95837b02d4f2a28f8f4d93b5efc119b333383c 100644
--- a/content/common/gpu/gpu_messages.h
+++ b/content/common/gpu/gpu_messages.h
@@ -682,8 +682,7 @@ IPC_SYNC_MESSAGE_ROUTED2_1(GpuCommandBufferMsg_CreateStreamTexture,
 IPC_MESSAGE_ROUTED1(AcceleratedVideoDecoderMsg_Decode,
                     AcceleratedVideoDecoderMsg_Decode_Params)
 
-// Sent from Renderer process to the GPU process to give the texture IDs for
-// the textures the decoder will use for output.
+// Give the texture IDs for the textures the decoder will use for output.
 IPC_MESSAGE_ROUTED2(AcceleratedVideoDecoderMsg_AssignPictureBuffers,
                     std::vector<int32>,  /* Picture buffer ID */
                     std::vector<uint32>) /* Texture ID */
@@ -699,6 +698,10 @@ IPC_MESSAGE_ROUTED0(AcceleratedVideoDecoderMsg_Flush)
 // Send reset request to the decoder.
 IPC_MESSAGE_ROUTED0(AcceleratedVideoDecoderMsg_Reset)
 
+// Set a CDM on the decoder to handle encrypted buffers.
+IPC_MESSAGE_ROUTED1(AcceleratedVideoDecoderMsg_SetCdm,
+                    int32) /* CDM ID */
+
 // Send destroy request to the decoder.
 IPC_MESSAGE_ROUTED0(AcceleratedVideoDecoderMsg_Destroy)
 
@@ -737,6 +740,10 @@ IPC_MESSAGE_ROUTED0(AcceleratedVideoDecoderHostMsg_FlushDone)
 // Confirm decoder has been reset.
 IPC_MESSAGE_ROUTED0(AcceleratedVideoDecoderHostMsg_ResetDone)
 
+// Notify the CDM setting result.
+IPC_MESSAGE_ROUTED1(AcceleratedVideoDecoderHostMsg_CdmSet,

[liberato (no reviews please), 2015/11/11 23:29:10]

if you're feeling sufficiently obsessive-compulsive, then please reorder to
match gpu_video_decode_accelerator, which itself doesn't match
video_decode_accelerator.h .  these were out of order before, though.

[dcheng, 2015/11/12 18:48:43]

I think this could be named more intuitively (because naively, you might read
this as setting the cdm too).

Maybe SetCdmDone to match Reset/ResetDone?

[xhwang, 2015/11/13 01:16:55]

I fixed gpu_vda, which is in a mess.

[xhwang, 2015/11/13 01:16:55]

Renamed to CdmAttached which is already used in various places:

https://code.google.com/p/chromium/codesearch#search/&q=CdmAttached&sq=packag...

+                    bool) /* success */
+
 // Video decoder has encountered an error.
 IPC_MESSAGE_ROUTED1(AcceleratedVideoDecoderHostMsg_ErrorNotification,
                     uint32) /* Error ID */