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 a04cfa2a1f80315b209d05479f60b831d6402c82..2384112340afa36649ca394715e5ce784fcc9d5e 100644
--- a/gpu/command_buffer/service/texture_manager.h
+++ b/gpu/command_buffer/service/texture_manager.h
@@ -339,10 +339,11 @@ class GPU_EXPORT Texture {
                                   GLenum format,
                                   GLenum type);
 
-  // Returns true if texture mip level is complete relative to first level.
-  static bool TextureMipComplete(const Texture::LevelInfo& level0_face,
+  // 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,
                                  GLenum target,
-                                 GLint level,
+                                 GLint level_diff,
                                  GLenum internal_format,
                                  GLsizei width,
                                  GLsizei height,
@@ -402,6 +403,10 @@ class GPU_EXPORT Texture {
   // referencing this texture.
   void IncAllFramebufferStateChangeCount();
 
+  void UpdateBaseLevel(GLint base_level);
+  void UpdateMaxLevel(GLint max_level);
+  void UpdateNumMipLevels();
+
   MailboxManager* mailbox_manager_;
 
   // Info about each face and level of texture.