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

ppapi/cpp/dev/video_decoder_dev.cc

Index: ppapi/cpp/dev/video_decoder_dev.cc
===================================================================
--- ppapi/cpp/dev/video_decoder_dev.cc	(revision 87330)
+++ ppapi/cpp/dev/video_decoder_dev.cc	(working copy)
@@ -24,10 +24,7 @@
 
 }  // namespace
 
-VideoDecoder::VideoDecoder(const Instance* /* instance */,
-                           const std::vector<uint32_t>& /* config */,
-                           CompletionCallback /* callback */,
-                           Client* client)
+VideoDecoder::VideoDecoder(const Instance* /* instance */, Client* client)
     : client_(client) {
   if (!has_interface<PPB_VideoDecoder_Dev>())
     return;
@@ -36,6 +33,12 @@
 
 VideoDecoder::~VideoDecoder() {}
 
+int32_t VideoDecoder::Init(const std::vector<uint32_t>& /* config */,
+                   CompletionCallback /* callback */) {
+  return PP_ERROR_FAILED;
+  // TODO(vmr): Implement.
+}
+
 vector<uint32_t> VideoDecoder::GetConfigs(
     Instance* /* instance */,
     const vector<uint32_t>& /* prototype_config */) {
@@ -57,31 +60,33 @@
   // TODO(vmr): Implement.
 }
 
-bool VideoDecoder::Decode(
+int32_t VideoDecoder::Decode(
     const PP_VideoBitstreamBuffer_Dev& /* bitstream_buffer */,
     CompletionCallback /* callback */) {
   // TODO(vmr): Implement.
-  if (!has_interface<PPB_VideoDecoder_Dev>() || !pp_resource())
-    return false;
-  return false;
+  if (!has_interface<PPB_VideoDecoder_Dev>())
+    return PP_ERROR_NOINTERFACE;
+  if (!pp_resource())
+    return PP_ERROR_BADRESOURCE;
+  return PP_ERROR_FAILED;
 }
 
 void VideoDecoder::ReusePictureBuffer(int32_t /* picture_buffer_id */) {
   // TODO(vmr): Implement.
 }
 
-bool VideoDecoder::Flush(CompletionCallback /* callback */) {
+int32_t VideoDecoder::Flush(CompletionCallback /* callback */) {
   // TODO(vmr): Implement.
   if (!has_interface<PPB_VideoDecoder_Dev>())
-    return false;
-  return true;
+    return PP_ERROR_NOINTERFACE;
+  return PP_ERROR_FAILED;
 }
 
-bool VideoDecoder::Abort(CompletionCallback /* callback */) {
+int32_t VideoDecoder::Abort(CompletionCallback /* callback */) {
   // TODO(vmr): Implement.
   if (!has_interface<PPB_VideoDecoder_Dev>())
-    return false;
-  return true;
+    return PP_ERROR_NOINTERFACE;
+  return PP_ERROR_FAILED;
 }
 
 }  // namespace pp