gpu: support GL_TEXTURE_CUBE_MAP destination target to Copy(Sub)TextureCHROMIUM.

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 e97feb327f1c5a37b6edc98fd1d4a39c21885657..c9b7018fb11709d03017eacdf6537e1cb98dbb8b 100644
--- a/gpu/command_buffer/service/texture_manager.h
+++ b/gpu/command_buffer/service/texture_manager.h
@@ -183,6 +183,10 @@ class GPU_EXPORT Texture {
     return immutable_;
   }
 
+  // In GLES2 "cube complete" means all 6 faces level 0 are defined, all the
+  // same format, all the same dimensions and all width = height.
+  bool cube_complete() const { return cube_complete_; }
+
   // Get the cleared rectangle for a particular level. Returns an empty
   // rectangle if level does not exist.
   gfx::Rect GetLevelClearedRect(GLenum target, GLint level) const;
@@ -274,12 +278,6 @@ class GPU_EXPORT Texture {
     return texture_complete_;
   }
 
-  // In GLES2 "cube complete" means all 6 faces level 0 are defined, all the
-  // same format, all the same dimensions and all width = height.
-  bool cube_complete() const {
-    return cube_complete_;
-  }
-
   // Whether or not this texture is a non-power-of-two texture.
   bool npot() const {
     return npot_;