Implement TextureImageTransportSurface using texture mailbox

gpu/command_buffer/service/texture_definition.cc

Index: gpu/command_buffer/service/texture_definition.cc
diff --git a/gpu/command_buffer/service/texture_definition.cc b/gpu/command_buffer/service/texture_definition.cc
index aba0dfa79599acb4720a4922420aa4cc22679fe5..e1c606f0d8a000a01a7797d4dbf72f2e86eef7a3 100644
--- a/gpu/command_buffer/service/texture_definition.cc
+++ b/gpu/command_buffer/service/texture_definition.cc
@@ -27,6 +27,18 @@ TextureDefinition::LevelInfo::LevelInfo(GLenum target,
       cleared(cleared) {
 }
 
+TextureDefinition::LevelInfo::LevelInfo()
+    : target(0),
+      internal_format(0),
+      width(0),
+      height(0),
+      depth(0),
+      border(0),
+      format(0),
+      type(0),
+      cleared(true) {
+}
+
 TextureDefinition::TextureDefinition(GLenum target,
                                      GLuint service_id,
                                      GLenum min_filter,