Cleanup GpuMemoryManager and helpers.

ui/gl/gl_context_glx.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 extern "C" {
 #include <X11/Xlib.h>
 }
 
 #include "ui/gl/gl_context_glx.h"
 
@@ skipping 175 matching lines @@
 std::string GLContextGLX::GetExtensions() {
   DCHECK(IsCurrent(nullptr));
   const char* extensions = GLSurfaceGLX::GetGLXExtensions();
   if (extensions) {
     return GLContext::GetExtensions() + " " + extensions;
   }
 
   return GLContext::GetExtensions();
 }
 
-bool GLContextGLX::GetTotalGpuMemory(size_t* bytes) {
-  DCHECK(bytes);
-  *bytes = 0;
-  if (HasExtension("GL_NVX_gpu_memory_info")) {
-    GLint kbytes = 0;
-    glGetIntegerv(GL_GPU_MEMORY_INFO_DEDICATED_VIDMEM_NVX, &kbytes);
-    *bytes =
-        base::saturated_cast<size_t>(1024u * static_cast<uint64_t>(kbytes));
-    return true;
-  }
-  return false;
-}
-
 bool GLContextGLX::WasAllocatedUsingRobustnessExtension() {
   return GLSurfaceGLX::IsCreateContextRobustnessSupported();
 }
 
 GLContextGLX::~GLContextGLX() {
   Destroy();
 }
 
 }  // namespace gfx