Calling OpenGL from the renderer process.

chrome/browser/renderer_host/render_widget_host_view_win.cc

 // Copyright (c) 2010 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 "chrome/browser/renderer_host/render_widget_host_view_win.h"
 
 #include "app/l10n_util.h"
 #include "app/l10n_util_win.h"
 #include "app/resource_bundle.h"
 #include "base/command_line.h"
@@ skipping 275 matching lines @@
       CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kEnableRendererAccessibility);
 }
 
 RenderWidgetHostViewWin::~RenderWidgetHostViewWin() {
   ResetTooltip();
 }
 
 void RenderWidgetHostViewWin::CreateWnd(HWND parent) {
   Create(parent);  // ATL function to create the window.
+
+  // Add a property indicating that a particular renderer is associated with
+  // this window. Used by the GPU process to validate window handles it
+  // receives from renderer processes.
+  int renderer_id = render_widget_host_->process()->id();
+  SetProp(m_hWnd,
+          chrome::kChromiumRendererIdProperty,
+          reinterpret_cast<HANDLE>(renderer_id));
+
   // Uncommenting this will enable experimental out-of-process painting.
   // Contact brettw for more,
   // gpu_view_host_.reset(new GpuViewHost(render_widget_host_, m_hWnd));
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 // RenderWidgetHostViewWin, RenderWidgetHostView implementation:
 
 void RenderWidgetHostViewWin::InitAsPopup(
     RenderWidgetHostView* parent_host_view, const gfx::Rect& pos) {
@@ skipping 1293 matching lines @@
     RenderWidgetHostView::GetRenderWidgetHostViewFromNativeView(
         gfx::NativeView native_view) {
   if (::IsWindow(native_view)) {
     HANDLE raw_render_host_view = ::GetProp(native_view,
                                             kRenderWidgetHostViewKey);
     if (raw_render_host_view)
       return reinterpret_cast<RenderWidgetHostView*>(raw_render_host_view);
   }
   return NULL;
 }