PPAPI: Fix interface functions that take PP_CompletionCallbacks, but don't

webkit/plugins/ppapi/ppb_video_decoder_impl.cc

Index: webkit/plugins/ppapi/ppb_video_decoder_impl.cc
===================================================================
--- webkit/plugins/ppapi/ppb_video_decoder_impl.cc	(revision 87892)
+++ webkit/plugins/ppapi/ppb_video_decoder_impl.cc	(working copy)
@@ -44,37 +44,39 @@
                                           num_of_matching_configs));
 }
 
-PP_Resource Create(PP_Instance instance_id,
-                   const PP_VideoConfigElement* decoder_config,
-                   PP_CompletionCallback callback) {
+PP_Resource Create(PP_Instance instance_id) {
   PluginInstance* instance = ResourceTracker::Get()->GetInstance(instance_id);
   if (!instance)
     return 0;
 
+  PPB_VideoDecoder_Impl* decoder = new PPB_VideoDecoder_Impl(instance);
+  return decoder->GetReference();
+}
+
+int32_t Initialize(PP_Resource video_decoder,
+                   const PP_VideoConfigElement* decoder_config,
+                   struct PP_CompletionCallback callback) {
   scoped_refptr<PPB_VideoDecoder_Impl> decoder(
-      new PPB_VideoDecoder_Impl(instance));
+      Resource::GetAs<PPB_VideoDecoder_Impl>(video_decoder));
+  if (!decoder)
+    return PP_ERROR_BADRESOURCE;
 
-  if (!decoder->Init(
-      const_cast<PP_VideoConfigElement*>(decoder_config), callback)) {
-    return 0;
-  }
-
-  return decoder->GetReference();
+  return decoder->Initialize(decoder_config, callback);
 }
 
 PP_Bool IsVideoDecoder(PP_Resource resource) {
   return BoolToPPBool(!!Resource::GetAs<PPB_VideoDecoder_Impl>(resource));
 }
 
-PP_Bool Decode(PP_Resource decoder_id,
+int32_t Decode(PP_Resource decoder_id,
                const PP_VideoBitstreamBuffer_Dev* bitstream_buffer,
                PP_CompletionCallback callback) {
   scoped_refptr<PPB_VideoDecoder_Impl> decoder(
       Resource::GetAs<PPB_VideoDecoder_Impl>(decoder_id));
   if (!decoder)
-    return PP_FALSE;
+    return PP_ERROR_BADRESOURCE;
 
-  return BoolToPPBool(decoder->Decode(bitstream_buffer, callback));
+  return decoder->Decode(bitstream_buffer, callback);
 }
 
 void AssignGLESBuffers(PP_Resource video_decoder,
@@ -108,28 +110,29 @@
   decoder->ReusePictureBuffer(picture_buffer_id);
 }
 
-PP_Bool Flush(PP_Resource video_decoder, PP_CompletionCallback callback) {
+int32_t Flush(PP_Resource video_decoder, PP_CompletionCallback callback) {
   scoped_refptr<PPB_VideoDecoder_Impl> decoder(
       Resource::GetAs<PPB_VideoDecoder_Impl>(video_decoder));
   if (!decoder)
-    return PP_FALSE;
+    return PP_ERROR_BADRESOURCE;
 
-  return BoolToPPBool(decoder->Flush(callback));
+  return decoder->Flush(callback);
 }
 
-PP_Bool Abort(PP_Resource video_decoder,
+int32_t Abort(PP_Resource video_decoder,
               PP_CompletionCallback callback) {
   scoped_refptr<PPB_VideoDecoder_Impl> decoder(
       Resource::GetAs<PPB_VideoDecoder_Impl>(video_decoder));
   if (!decoder)
-    return PP_FALSE;
+    return PP_ERROR_BADRESOURCE;
 
-  return BoolToPPBool(decoder->Abort(callback));
+  return decoder->Abort(callback);
 }
 
 const PPB_VideoDecoder_Dev ppb_videodecoder = {
   &GetConfigs,
   &Create,
+  &Initialize,
   &IsVideoDecoder,
   &Decode,
   &AssignGLESBuffers,
@@ -216,34 +219,41 @@
   return true;
 }
 
-bool PPB_VideoDecoder_Impl::Init(const PP_VideoConfigElement* decoder_config,
-                                 PP_CompletionCallback callback) {
+int32_t PPB_VideoDecoder_Impl::Initialize(
+    const PP_VideoConfigElement* decoder_config,
+    PP_CompletionCallback callback) {
+  if (!callback.func)
+    return PP_ERROR_BADARGUMENT;
   if (!instance())
-    return false;
+    return PP_ERROR_FAILED;
 
   platform_video_decoder_.reset(
       instance()->delegate()->CreateVideoDecoder(this));
 
+  if (!platform_video_decoder_.get())
+    return PP_ERROR_FAILED;
+
   std::vector<uint32> copied;
   // TODO(vrk): Validate configs before copy.
   CopyToConfigList(decoder_config, &copied);
-  platform_video_decoder_->Initialize(copied);
-
-  initialization_callback_ = callback;
-
-  return platform_video_decoder_.get()? true : false;
+  if (platform_video_decoder_->Initialize(copied)) {
+    initialization_callback_ = callback;
+    return PP_OK_COMPLETIONPENDING;
+  } else {
+    return PP_ERROR_FAILED;
+  }
 }
 
-bool PPB_VideoDecoder_Impl::Decode(
+int32_t PPB_VideoDecoder_Impl::Decode(
     const PP_VideoBitstreamBuffer_Dev* bitstream_buffer,
     PP_CompletionCallback callback) {
   if (!platform_video_decoder_.get())
-    return false;
+    return PP_ERROR_BADRESOURCE;
 
   ::ppapi::thunk::EnterResourceNoLock< ::ppapi::thunk::PPB_Buffer_API>
       enter(bitstream_buffer->data, true);
   if (enter.failed())
-    return false;
+    return PP_ERROR_FAILED;
 
   PPB_Buffer_Impl* buffer = static_cast<PPB_Buffer_Impl*>(enter.object());
   media::BitstreamBuffer decode_buffer(bitstream_buffer->id,
@@ -254,7 +264,10 @@
   // TODO(vmr): handle simultaneous decodes + callbacks.
   bitstream_buffer_callback_ = callback;
 
-  return platform_video_decoder_->Decode(decode_buffer);
+  if (platform_video_decoder_->Decode(decode_buffer))
+    return PP_OK_COMPLETIONPENDING;
+  else
+    return PP_ERROR_FAILED;
 }
 
 void PPB_VideoDecoder_Impl::AssignGLESBuffers(
@@ -293,26 +306,32 @@
   platform_video_decoder_->ReusePictureBuffer(picture_buffer_id);
 }
 
-bool PPB_VideoDecoder_Impl::Flush(PP_CompletionCallback callback) {
+int32_t PPB_VideoDecoder_Impl::Flush(PP_CompletionCallback callback) {
   if (!platform_video_decoder_.get())
-    return false;
+    return PP_ERROR_BADRESOURCE;
 
   // Store the callback to be called when Flush() is done.
   // TODO(vmr): Check for current flush/abort operations.
   flush_callback_ = callback;
 
-  return platform_video_decoder_->Flush();
+  if (platform_video_decoder_->Flush())
+    return PP_OK_COMPLETIONPENDING;
+  else
+    return PP_ERROR_FAILED;
 }
 
-bool PPB_VideoDecoder_Impl::Abort(PP_CompletionCallback callback) {
+int32_t PPB_VideoDecoder_Impl::Abort(PP_CompletionCallback callback) {
   if (!platform_video_decoder_.get())
-    return false;
+    return PP_ERROR_BADRESOURCE;
 
   // Store the callback to be called when Abort() is done.
   // TODO(vmr): Check for current flush/abort operations.
   abort_callback_ = callback;
 
-  return platform_video_decoder_->Abort();
+  if (platform_video_decoder_->Abort())
+    return PP_OK_COMPLETIONPENDING;
+  else
+    return PP_ERROR_FAILED;
 }
 
 void PPB_VideoDecoder_Impl::ProvidePictureBuffers(