Implement software fallback for PPB_VideoDecoder.

ppapi/proxy/video_decoder_resource.cc

Index: ppapi/proxy/video_decoder_resource.cc
diff --git a/ppapi/proxy/video_decoder_resource.cc b/ppapi/proxy/video_decoder_resource.cc
index 95365e8bba8e67e29c9834a7d0c118ef122067ae..39540292cf3cc15c58f82830003cec6a75bb70e5 100644
--- a/ppapi/proxy/video_decoder_resource.cc
+++ b/ppapi/proxy/video_decoder_resource.cc
@@ -7,6 +7,7 @@
 #include "base/bind.h"
 #include "gpu/command_buffer/client/gles2_cmd_helper.h"
 #include "gpu/command_buffer/client/gles2_implementation.h"
+#include "gpu/command_buffer/common/mailbox.h"
 #include "ipc/ipc_message.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/c/ppb_opengles2.h"
@@ -332,8 +333,10 @@ void VideoDecoderResource::OnPluginMsgRequestTextures(
     const ResourceMessageReplyParams& params,
     uint32_t num_textures,
     const PP_Size& size,
-    uint32_t texture_target) {
+    uint32_t texture_target,
+    const std::vector<gpu::Mailbox>& mailboxes) {
   DCHECK(num_textures);
+  DCHECK(!mailboxes.size() || mailboxes.size() == num_textures);

[dmichael (off chromium), 2014/06/05 23:00:44]

!mailboxes.size()
->
mailboxes.empty()

[bbudge, 2014/06/06 02:03:46]

Done.

   std::vector<uint32_t> texture_ids(num_textures);
   if (gles2_impl_) {
     gles2_impl_->GenTextures(num_textures, &texture_ids.front());
@@ -360,6 +363,8 @@ void VideoDecoderResource::OnPluginMsgRequestTextures(
                                 GL_UNSIGNED_BYTE,
                                 NULL);
       }
+      if (!mailboxes.empty())
+        gles2_impl_->ProduceTextureCHROMIUM(GL_TEXTURE_2D, mailboxes[i].name);
 
       textures_.insert(
           std::make_pair(texture_ids[i], Texture(texture_target, size)));