Revert of Fix WebGL 2 texture renderability check.

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 7a3065ee99523c013d04827eb021c88ecbeeeb0d..33cd54ad225b682f962f69e169f49e67c94cef86 100644
--- a/gpu/command_buffer/service/texture_manager.h
+++ b/gpu/command_buffer/service/texture_manager.h
@@ -272,9 +272,7 @@
     FaceInfo();
     ~FaceInfo();
 
-    // This is relative to base_level and max_level of a texture.
     GLsizei num_mip_levels;
-    // This contains slots for all levels starting at 0.
     std::vector<LevelInfo> level_infos;
   };
 
@@ -364,11 +362,10 @@
                                   GLenum format,
                                   GLenum type);
 
-  // Returns true if texture mip level is complete relative to base level.
-  // Note that level_diff = level - base_level.
-  static bool TextureMipComplete(const Texture::LevelInfo& base_level_face,
+  // Returns true if texture mip level is complete relative to first level.
+  static bool TextureMipComplete(const Texture::LevelInfo& level0_face,
                                  GLenum target,
-                                 GLint level_diff,
+                                 GLint level,
                                  GLenum internal_format,
                                  GLsizei width,
                                  GLsizei height,
@@ -420,10 +417,6 @@
   // Increment the framebuffer state change count in all the managers
   // referencing this texture.
   void IncAllFramebufferStateChangeCount();
-
-  void UpdateBaseLevel(GLint base_level);
-  void UpdateMaxLevel(GLint max_level);
-  void UpdateNumMipLevels();
 
   MailboxManager* mailbox_manager_;