Add reference-counting for mailbox textures.

gpu/command_buffer/service/gles2_cmd_decoder.cc

Index: gpu/command_buffer/service/gles2_cmd_decoder.cc
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder.cc b/gpu/command_buffer/service/gles2_cmd_decoder.cc
index ec5b2abd19fde36ab46ebf8054cd5a048e70db81..1e32eefc1b587fdd051d5b1cae67f118ba6796fe 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder.cc
@@ -9992,7 +9992,7 @@ void GLES2DecoderImpl::DoProduceTextureCHROMIUM(GLenum target,
       target,
       *reinterpret_cast<const MailboxName*>(mailbox),
       definition,
-      texture_manager())) {
+      MailboxManager::TexturePoolNone)) {
     bool success = texture_manager()->Restore(
         "glProductTextureCHROMIUM", this, texture, definition);
     DCHECK(success);
@@ -10019,11 +10019,11 @@ void GLES2DecoderImpl::DoConsumeTextureCHROMIUM(GLenum target,
     return;
   }
 
-  scoped_ptr<TextureDefinition> definition(
+  TextureDefinition* definition(
       group_->mailbox_manager()->ConsumeTexture(
       target,
       *reinterpret_cast<const MailboxName*>(mailbox)));
-  if (!definition.get()) {
+  if (!definition) {
     LOCAL_SET_GL_ERROR(
         GL_INVALID_OPERATION,
         "glConsumeTextureCHROMIUM", "invalid mailbox name");
@@ -10031,7 +10031,7 @@ void GLES2DecoderImpl::DoConsumeTextureCHROMIUM(GLenum target,
   }
 
   if (!texture_manager()->Restore(
-      "glConsumeTextureCHROMIUM", this, texture, definition.release())) {
+      "glConsumeTextureCHROMIUM", this, texture, definition)) {
     LOCAL_SET_GL_ERROR(
         GL_INVALID_OPERATION,
         "glConsumeTextureCHROMIUM", "invalid texture");