Updating calls to offscreen buffers to use a size of (0,0) when they do not require an actual buffer

ui/gl/gl_surface_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_surface_glx.h"
 
@@ skipping 564 matching lines @@
 }
 
 NativeViewGLSurfaceGLX::~NativeViewGLSurfaceGLX() {
   Destroy();
 }
 
 PbufferGLSurfaceGLX::PbufferGLSurfaceGLX(const gfx::Size& size)
   : size_(size),
     config_(NULL),
     pbuffer_(0) {
+  // Some implementations of Pbuffer do not support having a 0 size. For such
+  // cases use a (1, 1) surface.
+  if (size_.GetArea() == 0)
+    size_.SetSize(1, 1);
 }
 
 bool PbufferGLSurfaceGLX::Initialize() {
   DCHECK(!pbuffer_);
 
   static const int config_attributes[] = {
     GLX_BUFFER_SIZE, 32,
     GLX_ALPHA_SIZE, 8,
     GLX_BLUE_SIZE, 8,
     GLX_GREEN_SIZE, 8,
@@ skipping 66 matching lines @@
 
 void* PbufferGLSurfaceGLX::GetConfig() {
   return config_;
 }
 
 PbufferGLSurfaceGLX::~PbufferGLSurfaceGLX() {
   Destroy();
 }
 
 }  // namespace gfx