Remove unused SurfaceTextureGLOwner::texture_id_

Some jumbo builds broke because of unused class member triggering
a compiler warning. That a class member is unused might sometimes
not be noticed in normal builds because the compiler doesn't have
access to the source of all class methods.

Bug: 892490

Change-Id: I733ec2d36be4639d49ea692b3d490da206215522
Reviewed-on: https://chromium-review.googlesource.com/c/1400824
Reviewed-by: Frank Liberato <liberato@chromium.org>
Reviewed-by: Dale Curtis <dalecurtis@chromium.org>
Commit-Queue: Daniel Bratell <bratell@opera.com>
Cr-Commit-Position: refs/heads/master@{#621089}
diff --git a/media/gpu/android/surface_texture_gl_owner.h b/media/gpu/android/surface_texture_gl_owner.h
index a96ed6d..d95a312 100644
--- a/media/gpu/android/surface_texture_gl_owner.h
+++ b/media/gpu/android/surface_texture_gl_owner.h
@@ -47,8 +47,7 @@
   ~SurfaceTextureGLOwner() override;
 
   scoped_refptr<gl::SurfaceTexture> surface_texture_;
-  GLuint texture_id_;
-  // The context and surface that were used to create |texture_id_|.
+  // The context and surface that were used to create |surface_texture_|.
   scoped_refptr<gl::GLContext> context_;
   scoped_refptr<gl::GLSurface> surface_;
   // When SetReleaseTimeToNow() was last called. i.e., when the last