GLSurface::Resize implementations release the current context if they are current before resize.

ui/gfx/gl/gl_surface_egl.cc

 // Copyright (c) 2011 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.
 
 #include "ui/gfx/gl/gl_surface_egl.h"
 
 #include "build/build_config.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #if !defined(OS_ANDROID)
 #include "third_party/angle/include/EGL/egl.h"
 #include "third_party/angle/include/EGL/eglext.h"
 #endif
 #include "ui/gfx/gl/egl_util.h"
+#include "ui/gfx/gl/gl_context.h"
 
 #if defined(OS_ANDROID)
 #include <EGL/egl.h>
 #endif
 
 // This header must come after the above third-party include, as
 // it brings in #defines that cause conflicts.
 #include "ui/gfx/gl/gl_bindings.h"
 
 #if defined(USE_X11) && !defined(USE_WAYLAND)
@@ skipping 325 matching lines @@
 }
 
 gfx::Size PbufferGLSurfaceEGL::GetSize() {
   return size_;
 }
 
 bool PbufferGLSurfaceEGL::Resize(const gfx::Size& size) {
   if (size == size_)
     return true;
 
+  GLContext* current_context = GLContext::GetCurrent();
+  bool was_current = current_context && current_context->IsCurrent(this);
+  if (was_current)
+    current_context->ReleaseCurrent(this);
+
   Destroy();
+
   size_ = size;
-  return Initialize();
+
+  if (!Initialize())
+    return false;
+
+  if (was_current)
+    return current_context->MakeCurrent(this);
+
+  return true;
 }
 
 EGLSurface PbufferGLSurfaceEGL::GetHandle() {
   return surface_;
 }
 
 void* PbufferGLSurfaceEGL::GetShareHandle() {
 #if defined(OS_ANDROID)
   NOTREACHED();
   return NULL;
 #else
   const char* extensions = eglQueryString(g_display, EGL_EXTENSIONS);
   if (!strstr(extensions, "EGL_ANGLE_query_surface_pointer"))
     return NULL;
 
   void* handle;
   if (!eglQuerySurfacePointerANGLE(g_display,
                                    GetHandle(),
                                    EGL_D3D_TEXTURE_2D_SHARE_HANDLE_ANGLE,
                                    &handle)) {
     return NULL;
   }
 
   return handle;
 #endif
 }
 
 }  // namespace gfx