Workground for glGenerateMipmap bug in some drivers.

gpu/command_buffer/service/texture_manager.h

Index: gpu/command_buffer/service/texture_manager.h
diff --git a/gpu/command_buffer/service/texture_manager.h b/gpu/command_buffer/service/texture_manager.h
index ee3367bb62c076511b4389daa1a26bd971e59290..87ed1ce9cd7ecbf52b55ce7e9ce69501dc14e8ea 100644
--- a/gpu/command_buffer/service/texture_manager.h
+++ b/gpu/command_buffer/service/texture_manager.h
@@ -44,6 +44,22 @@ class TextureManager {
           owned_(true) {
     }
 
+    GLenum min_filter() const {
+      return min_filter_;
+    }
+
+    GLenum mag_filter() const {
+      return mag_filter_;
+    }
+
+    GLenum wrap_s() const {
+      return wrap_s_;
+    }
+
+    GLenum wrap_t() const {
+      return wrap_t_;
+    }
+
     // True if this texture meets all the GLES2 criteria for rendering.
     // See section 3.8.2 of the GLES2 spec.
     bool CanRender(const FeatureInfo* feature_info) const;