Update from https://crrev.com/314320

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 edd42717d3702ba9b421d5ba87ae79549ca11377..7af662c400c7b29348a117ff1c42621f80a10000 100644
--- a/gpu/command_buffer/service/texture_definition.cc
+++ b/gpu/command_buffer/service/texture_definition.cc
@@ -413,7 +413,8 @@ bool TextureDefinition::Matches(const Texture* texture) const {
   if (texture->min_filter_ != min_filter_ ||
       texture->mag_filter_ != mag_filter_ ||
       texture->wrap_s_ != wrap_s_ ||
-      texture->wrap_t_ != wrap_t_) {
+      texture->wrap_t_ != wrap_t_ ||
+      texture->SafeToRenderFrom() != SafeToRenderFrom()) {
     return false;
   }
 
@@ -424,5 +425,16 @@ bool TextureDefinition::Matches(const Texture* texture) const {
   return true;
 }
 
+bool TextureDefinition::SafeToRenderFrom() const {
+  for (const std::vector<LevelInfo>& face_info : level_infos_) {
+    for (const LevelInfo& level_info : face_info) {
+      if (!level_info.cleared) {
+        return false;
+      }
+    }
+  }
+  return true;
+}
+
 }  // namespace gles2
 }  // namespace gpu