Revert 89002 - Enforce RGB even on buggy drivers.

gpu/command_buffer/service/texture_manager.h

Index: gpu/command_buffer/service/texture_manager.h
===================================================================
--- gpu/command_buffer/service/texture_manager.h	(revision 89013)
+++ gpu/command_buffer/service/texture_manager.h	(working copy)
@@ -42,7 +42,6 @@
           cube_complete_(false),
           npot_(false),
           has_been_bound_(false),
-          framebuffer_attachment_count_(0),
           owned_(true) {
     }
 
@@ -132,19 +131,6 @@
       owned_ = false;
     }
 
-    bool IsAttachedToFramebuffer() const {
-      return framebuffer_attachment_count_ != 0;
-    }
-
-    void AttachToFramebuffer() {
-      ++framebuffer_attachment_count_;
-    }
-
-    void DetachFromFramebuffer() {
-      DCHECK(framebuffer_attachment_count_ > 0);
-      --framebuffer_attachment_count_;
-    }
-
    private:
     friend class TextureManager;
     friend class base::RefCounted<TextureInfo>;
@@ -254,9 +240,6 @@
     // Whether this texture has ever been bound.
     bool has_been_bound_;
 
-    // The number of framebuffers this texture is attached to.
-    int framebuffer_attachment_count_;
-
     // Whether the associated context group owns this texture and should delete
     // it.
     bool owned_;