Changes necessary to compile gpu demos on linux. It is not functional yet just compiling.

BUG=26099
Review URL: http://codereview.chromium.org/552240

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@37977 0039d316-1c4b-4281-b951-d872f2087c98

7 files changed, 329 insertions, 247 deletions

diff --git a/gpu/demos/demos.gyp b/gpu/demos/demos.gyp
index 10d3cba..d69ae75c 100644
--- a/gpu/demos/demos.gyp
+++ b/gpu/demos/demos.gyp
@@ -5,6 +5,18 @@
 {
   'variables': {
     'chromium_code': 1,
+    'conditions': [
+      # Pepper demos that are compiled as shared libraries need to be compiled
+      # with -fPIC flag. All static libraries that these demos depend on must
+      # also be compiled with -fPIC flag. Setting GYP_DEFINES="linux_fpic=1"
+      # compiles everything with -fPIC. Disable pepper demos on linux/x64
+      # unless linux_fpic is 1.
+      ['OS=="linux" and (target_arch=="x64" or target_arch=="arm") and linux_fpic!=1', {
+        'enable_pepper_demos%': 0,
+      }, {
+        'enable_pepper_demos%': 1,
+      }],
+    ],
   },
   'includes': [
     '../../build/common.gypi',
@@ -30,16 +42,18 @@
         '../gpu.gyp:command_buffer_client',
         '../gpu.gyp:command_buffer_service',
       ],
-      'all_dependent_settings': {
-        'sources': [
-          'framework/main_exe.cc',
-        ],
-      },
       'sources': [
-        'framework/platform.h',
         'framework/window.cc',
         'framework/window.h',
       ],
+      'conditions': [
+        ['OS=="linux"', {'sources': ['framework/window_linux.cc']}],
+        ['OS=="mac"', {'sources': ['framework/window_mac.mm']}],
+        ['OS=="win"', {'sources': ['framework/window_win.cc']}],
+      ],
+      'direct_dependent_settings': {
+        'sources': ['framework/main_exe.cc'],
+      },
     },
     {
       'target_name': 'gpu_demo_framework_pepper',
@@ -48,27 +62,37 @@
         'gpu_demo_framework',
         '../gpu.gyp:pgl',
       ],
-      'all_dependent_settings': {
-        'sources': [
-          'framework/main_pepper.cc',
-          'framework/plugin.def',
-          'framework/plugin.rc',
-        ],
-        'run_as': {
-          'action': [
-            '<(PRODUCT_DIR)/<(EXECUTABLE_PREFIX)chrome<(EXECUTABLE_SUFFIX)',
-            '--no-sandbox',
-            '--internal-pepper',
-            '--enable-gpu-plugin',
-            '--load-plugin=$(TargetPath)',
-            'file://$(ProjectDir)pepper_gpu_demo.html',
-          ],
-        },
-      },
       'sources': [
         'framework/plugin.cc',
         'framework/plugin.h',
       ],
+      'direct_dependent_settings': {
+        'sources': [
+          'framework/main_pepper.cc',
+        ],
+        'conditions': [
+          ['OS=="win"', {
+            'sources': [
+              'framework/plugin.def',
+              'framework/plugin.rc',
+            ],
+            'run_as': {
+              'action': [
+                '<(PRODUCT_DIR)/<(EXECUTABLE_PREFIX)chrome<(EXECUTABLE_SUFFIX)',
+                '--no-sandbox',
+                '--internal-pepper',
+                '--enable-gpu-plugin',
+                '--load-plugin=$(TargetPath)',
+                'file://$(ProjectDir)pepper_gpu_demo.html',
+              ],
+            },
+          }],
+          ['OS=="linux"', {
+            # -gstabs, used in the official builds, causes an ICE. Remove it.
+            'cflags!': ['-gstabs'],
+          }],
+        ],
+      },
     },
     {
       'target_name': 'hello_triangle_exe',
@@ -83,18 +107,6 @@
       ],
     },
     {
-      'target_name': 'hello_triangle_pepper',
-      'type': 'shared_library',
-      'dependencies': [
-        'gpu_demo_framework_pepper',
-        '../../third_party/gles2_book/gles2_book.gyp:hello_triangle',
-      ],
-      'sources': [
-        'gles2_book/example.h',
-        'gles2_book/hello_triangle.cc',
-      ],
-    },
-    {
       'target_name': 'mip_map_2d_exe',
       'type': 'executable',
       'dependencies': [
@@ -107,18 +119,6 @@
       ],
     },
     {
-      'target_name': 'mip_map_2d_pepper',
-      'type': 'shared_library',
-      'dependencies': [
-        'gpu_demo_framework_pepper',
-        '../../third_party/gles2_book/gles2_book.gyp:mip_map_2d',
-      ],
-      'sources': [
-        'gles2_book/example.h',
-        'gles2_book/mip_map_2d.cc',
-      ],
-    },
-    {
       'target_name': 'simple_texture_2d_exe',
       'type': 'executable',
       'dependencies': [
@@ -131,18 +131,6 @@
       ],
     },
     {
-      'target_name': 'simple_texture_2d_pepper',
-      'type': 'shared_library',
-      'dependencies': [
-        'gpu_demo_framework_pepper',
-        '../../third_party/gles2_book/gles2_book.gyp:simple_texture_2d',
-      ],
-      'sources': [
-        'gles2_book/example.h',
-        'gles2_book/simple_texture_2d.cc',
-      ],
-    },
-    {
       'target_name': 'simple_texture_cubemap_exe',
       'type': 'executable',
       'dependencies': [
@@ -155,18 +143,6 @@
       ],
     },
     {
-      'target_name': 'simple_texture_cubemap_pepper',
-      'type': 'shared_library',
-      'dependencies': [
-        'gpu_demo_framework_pepper',
-        '../../third_party/gles2_book/gles2_book.gyp:simple_texture_cubemap',
-      ],
-      'sources': [
-        'gles2_book/example.h',
-        'gles2_book/simple_texture_cubemap.cc',
-      ],
-    },
-    {
       'target_name': 'simple_vertex_shader_exe',
       'type': 'executable',
       'dependencies': [
@@ -179,18 +155,6 @@
       ],
     },
     {
-      'target_name': 'simple_vertex_shader_pepper',
-      'type': 'shared_library',
-      'dependencies': [
-        'gpu_demo_framework_pepper',
-        '../../third_party/gles2_book/gles2_book.gyp:simple_vertex_shader',
-      ],
-      'sources': [
-        'gles2_book/example.h',
-        'gles2_book/simple_vertex_shader.cc',
-      ],
-    },
-    {
       'target_name': 'stencil_test_exe',
       'type': 'executable',
       'dependencies': [
@@ -203,18 +167,6 @@
       ],
     },
     {
-      'target_name': 'stencil_test_pepper',
-      'type': 'shared_library',
-      'dependencies': [
-        'gpu_demo_framework_pepper',
-        '../../third_party/gles2_book/gles2_book.gyp:stencil_test',
-      ],
-      'sources': [
-        'gles2_book/example.h',
-        'gles2_book/stencil_test.cc',
-      ],
-    },
-    {
       'target_name': 'texture_wrap_exe',
       'type': 'executable',
       'dependencies': [
@@ -226,19 +178,97 @@
         'gles2_book/texture_wrap.cc',
       ],
     },
-    {
-      'target_name': 'texture_wrap_pepper',
-      'type': 'shared_library',
-      'dependencies': [
-        'gpu_demo_framework_pepper',
-        '../../third_party/gles2_book/gles2_book.gyp:texture_wrap',
-      ],
-      'sources': [
-        'gles2_book/example.h',
-        'gles2_book/texture_wrap.cc',
+  ],
+  'conditions': [
+    ['enable_pepper_demos==1', {
+      'targets': [
+        {
+          'target_name': 'hello_triangle_pepper',
+          'type': 'shared_library',
+          'dependencies': [
+            'gpu_demo_framework_pepper',
+            '../../third_party/gles2_book/gles2_book.gyp:hello_triangle',
+          ],
+          'sources': [
+            'gles2_book/example.h',
+            'gles2_book/hello_triangle.cc',
+          ],
+        },
+        {
+          'target_name': 'mip_map_2d_pepper',
+          'type': 'shared_library',
+          'dependencies': [
+            'gpu_demo_framework_pepper',
+            '../../third_party/gles2_book/gles2_book.gyp:mip_map_2d',
+          ],
+          'sources': [
+            'gles2_book/example.h',
+            'gles2_book/mip_map_2d.cc',
+          ],
+        },
+        {
+          'target_name': 'simple_texture_2d_pepper',
+          'type': 'shared_library',
+          'dependencies': [
+            'gpu_demo_framework_pepper',
+            '../../third_party/gles2_book/gles2_book.gyp:simple_texture_2d',
+          ],
+          'sources': [
+            'gles2_book/example.h',
+            'gles2_book/simple_texture_2d.cc',
+          ],
+        },
+        {
+          'target_name': 'simple_texture_cubemap_pepper',
+          'type': 'shared_library',
+          'dependencies': [
+            'gpu_demo_framework_pepper',
+            '../../third_party/gles2_book/gles2_book.gyp:simple_texture_cubemap',
+          ],
+          'sources': [
+            'gles2_book/example.h',
+            'gles2_book/simple_texture_cubemap.cc',
+          ],
+        },
+        {
+          'target_name': 'simple_vertex_shader_pepper',
+          'type': 'shared_library',
+          'dependencies': [
+            'gpu_demo_framework_pepper',
+            '../../third_party/gles2_book/gles2_book.gyp:simple_vertex_shader',
+          ],
+          'sources': [
+            'gles2_book/example.h',
+            'gles2_book/simple_vertex_shader.cc',
+          ],
+        },
+        {
+          'target_name': 'stencil_test_pepper',
+          'type': 'shared_library',
+          'dependencies': [
+            'gpu_demo_framework_pepper',
+            '../../third_party/gles2_book/gles2_book.gyp:stencil_test',
+          ],
+          'sources': [
+            'gles2_book/example.h',
+            'gles2_book/stencil_test.cc',
+          ],
+        },
+        {
+          'target_name': 'texture_wrap_pepper',
+          'type': 'shared_library',
+          'dependencies': [
+            'gpu_demo_framework_pepper',
+            '../../third_party/gles2_book/gles2_book.gyp:texture_wrap',
+          ],
+          'sources': [
+            'gles2_book/example.h',
+            'gles2_book/texture_wrap.cc',
+          ],
+        },
       ],
-    },
-  ]
+    }],
+  ],
 }
 
 # Local Variables:
diff --git a/gpu/demos/framework/platform.h b/gpu/demos/framework/platform.h
deleted file mode 100644
index cd6c003..0000000
--- a/gpu/demos/framework/platform.h
+++ /dev/null
@@ -1,25 +0,0 @@
-// Copyright (c) 2006-2009 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.
-
-// Platform-specific types and definitions for native widget handles.
-
-#ifndef GPU_DEMOS_FRAMEWORK_PLATFORM_H_
-#define GPU_DEMOS_FRAMEWORK_PLATFORM_H_
-
-#ifdef _WINDOWS
-#include <windows.h>
-#endif  // _WINDOWS
-
-#include "build/build_config.h"
-
-namespace gpu {
-namespace demos {
-
-#if defined(OS_WIN)
-typedef HWND NativeWindowHandle;
-#endif  // defined(OS_WIN)
-
-}  // namespace demos
-}  // namespace gpu
-#endif  // GPU_DEMOS_FRAMEWORK_PLATFORM_H_
diff --git a/gpu/demos/framework/window.cc b/gpu/demos/framework/window.cc
index 41538d5..d258792 100644
--- a/gpu/demos/framework/window.cc
+++ b/gpu/demos/framework/window.cc
@@ -8,6 +8,7 @@
 #include "gpu/command_buffer/client/gles2_lib.h"
 #include "gpu/command_buffer/service/command_buffer_service.h"
 #include "gpu/command_buffer/service/gpu_processor.h"
+#include "gpu/demos/framework/demo.h"
 #include "gpu/demos/framework/demo_factory.h"
 
 using gpu::Buffer;
@@ -16,81 +17,39 @@ using gpu::GPUProcessor;
 using gpu::gles2::GLES2CmdHelper;
 using gpu::gles2::GLES2Implementation;
 
-// TODO(alokp): Make this class cross-platform. Investigate using SDL.
 namespace {
 const int32 kCommandBufferSize = 1024 * 1024;
 const int32 kTransferBufferSize = 512 * 1024;
+}  // namespace.
 
-LRESULT CALLBACK WindowProc(HWND hwnd, UINT msg,
-                            WPARAM w_param, LPARAM l_param) {
-  LRESULT result = 0;
-  switch (msg) {
-    case WM_CLOSE:
-      ::DestroyWindow(hwnd);
-      break;
-    case WM_DESTROY:
-      ::PostQuitMessage(0);
-      break;
-    case WM_ERASEBKGND:
-      break;
-    case WM_PAINT: {
-      gpu::demos::Window* window = reinterpret_cast<gpu::demos::Window*>(
-          GetWindowLongPtr(hwnd, GWL_USERDATA));
-      if (window != NULL) window->OnPaint();
-      ::ValidateRect(hwnd, NULL);
-      break;
-    }
-    default:
-      result = ::DefWindowProc(hwnd, msg, w_param, l_param);
-      break;
-  }
-  return result;
+namespace gpu {
+namespace demos {
+
+Window::Window()
+  : window_handle_(NULL),
+    demo_(CreateDemo()) {
+}
+
+Window::~Window() {
 }
 
-HWND CreateNativeWindow(const wchar_t* title, int width, int height,
-                        LONG_PTR user_data) {
-  WNDCLASS wnd_class = {0};
-  HINSTANCE instance = GetModuleHandle(NULL);
-  wnd_class.style = CS_OWNDC;
-  wnd_class.lpfnWndProc = WindowProc;
-  wnd_class.hInstance = instance;
-  wnd_class.hbrBackground =
-      reinterpret_cast<HBRUSH>(GetStockObject(BLACK_BRUSH));
-  wnd_class.lpszClassName = L"gpu_demo";
-  if (!RegisterClass(&wnd_class)) return NULL;
-
-  DWORD wnd_style = WS_VISIBLE | WS_POPUP | WS_BORDER | WS_SYSMENU | WS_CAPTION;
-  RECT wnd_rect;
-  wnd_rect.left = 0;
-  wnd_rect.top = 0;
-  wnd_rect.right = width;
-  wnd_rect.bottom = height;
-  AdjustWindowRect(&wnd_rect, wnd_style, FALSE);
-
-  HWND hwnd = CreateWindow(
-      wnd_class.lpszClassName,
-      title,
-      wnd_style,
-      0,
-      0,
-      wnd_rect.right - wnd_rect.left,
-      wnd_rect.bottom - wnd_rect.top,
-      NULL,
-      NULL,
-      instance,
-      NULL);
-  if (hwnd == NULL) return NULL;
-
-  ShowWindow(hwnd, SW_SHOWNORMAL);
-  // Set this to the GWL_USERDATA so that it is available to WindowProc.
-  SetWindowLongPtr(hwnd, GWL_USERDATA, user_data);
-
-  return hwnd;
+bool Window::Init(int width, int height) {
+  window_handle_ = CreateNativeWindow(demo_->Title(), width, height);
+  if (window_handle_ == NULL)
+    return false;
+  if (!CreateRenderContext(PluginWindow(window_handle_)))
+    return false;
+
+  demo_->InitWindowSize(width, height);
+  return demo_->InitGL();
 }
 
-bool InitRenderContext(HWND hwnd) {
-  CHECK(hwnd);
+void Window::OnPaint() {
+  demo_->Draw();
+  ::gles2::GetGLContext()->SwapBuffers();
+}
 
+bool Window::CreateRenderContext(gfx::PluginWindowHandle hwnd) {
   scoped_ptr<CommandBufferService> command_buffer(new CommandBufferService);
   if (!command_buffer->Initialize(kCommandBufferSize)) {
     return false;
@@ -117,54 +76,14 @@ bool InitRenderContext(HWND hwnd) {
       command_buffer->GetTransferBuffer(transfer_buffer_id);
   if (transfer_buffer.ptr == NULL) return false;
 
-  gles2::Initialize();
-  gles2::SetGLContext(new GLES2Implementation(helper,
-                                              transfer_buffer.size,
-                                              transfer_buffer.ptr,
-                                              transfer_buffer_id));
+  ::gles2::Initialize();
+  ::gles2::SetGLContext(new GLES2Implementation(helper,
+                                                transfer_buffer.size,
+                                                transfer_buffer.ptr,
+                                                transfer_buffer_id));
   return command_buffer.release() != NULL;
 }
-}  // namespace.
-
-namespace gpu {
-namespace demos {
-
-Window::Window()
-  : window_handle_(NULL),
-    demo_(CreateDemo()) {
-}
-
-Window::~Window() {
-}
-
-bool Window::Init(int width, int height) {
-  window_handle_ = CreateNativeWindow(demo_->Title(), width, height,
-                                      reinterpret_cast<LONG_PTR>(this));
-  if (window_handle_ == NULL) return false;
-  if (!InitRenderContext(window_handle_)) return false;
-
-  demo_->InitWindowSize(width, height);
-  return demo_->InitGL();
-}
-
-void Window::MainLoop() {
-  MSG msg;
-  bool done = false;
-  while (!done) {
-    while (::PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) {
-      if (msg.message == WM_QUIT) done = true;
-      ::TranslateMessage(&msg);
-      ::DispatchMessage(&msg);
-    }
-    // Message queue is empty and application has not quit yet - keep painting.
-    if (!done) ::UpdateWindow(window_handle_);
-  }
-}
-
-void Window::OnPaint() {
-  demo_->Draw();
-  ::gles2::GetGLContext()->SwapBuffers();
-}
 
 }  // namespace demos
 }  // namespace gpu
+
diff --git a/gpu/demos/framework/window.h b/gpu/demos/framework/window.h
index dade945..a84ecf8 100644
--- a/gpu/demos/framework/window.h
+++ b/gpu/demos/framework/window.h
@@ -5,13 +5,14 @@
 #ifndef GPU_DEMOS_FRAMEWORK_WINDOW_H_
 #define GPU_DEMOS_FRAMEWORK_WINDOW_H_
 
+#include "app/gfx/native_widget_types.h"
 #include "base/scoped_ptr.h"
-#include "gpu/demos/framework/demo.h"
-#include "gpu/demos/framework/platform.h"
 
 namespace gpu {
 namespace demos {
 
+class Demo;
+
 // Acts as a framework for standalone demos. It creates a window and delegates
 // all events to demo to perform rendering and other tasks.
 class Window {
@@ -28,7 +29,15 @@ class Window {
   void OnPaint();
 
  private:
-  NativeWindowHandle window_handle_;
+  // Creates and shows a native window with the given title and dimensions.
+  gfx::NativeWindow CreateNativeWindow(const wchar_t* title,
+                                       int width, int height);
+  // Converts native window handle to NPAPI plugin window handle.
+  gfx::PluginWindowHandle PluginWindow(gfx::NativeWindow hwnd);
+  // Creates an OpenGL ES 2.0 rendering context for the given window.
+  bool CreateRenderContext(gfx::PluginWindowHandle hwnd);
+
+  gfx::NativeWindow window_handle_;
   scoped_ptr<Demo> demo_;
 
   DISALLOW_COPY_AND_ASSIGN(Window);
@@ -37,3 +46,4 @@ class Window {
 }  // namespace demos
 }  // namespace gpu
 #endif  // GPU_DEMOS_FRAMEWORK_WINDOW_H_
+
diff --git a/gpu/demos/framework/window_linux.cc b/gpu/demos/framework/window_linux.cc
new file mode 100644
index 0000000..4f07a24
--- /dev/null
+++ b/gpu/demos/framework/window_linux.cc
@@ -0,0 +1,24 @@
+// 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 "gpu/demos/framework/window.h"
+
+namespace gpu {
+namespace demos {
+
+void Window::MainLoop() {
+}
+
+gfx::NativeWindow Window::CreateNativeWindow(const wchar_t* title,
+                                             int width, int height) {
+  return NULL;
+}
+
+gfx::PluginWindowHandle Window::PluginWindow(gfx::NativeWindow hwnd) {
+  return gfx::kNullPluginWindow;
+}
+
+}  // namespace demos
+}  // namespace gpu
+
diff --git a/gpu/demos/framework/window_mac.mm b/gpu/demos/framework/window_mac.mm
new file mode 100644
index 0000000..4f07a24
--- /dev/null
+++ b/gpu/demos/framework/window_mac.mm
@@ -0,0 +1,24 @@
+// 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 "gpu/demos/framework/window.h"
+
+namespace gpu {
+namespace demos {
+
+void Window::MainLoop() {
+}
+
+gfx::NativeWindow Window::CreateNativeWindow(const wchar_t* title,
+                                             int width, int height) {
+  return NULL;
+}
+
+gfx::PluginWindowHandle Window::PluginWindow(gfx::NativeWindow hwnd) {
+  return gfx::kNullPluginWindow;
+}
+
+}  // namespace demos
+}  // namespace gpu
+
diff --git a/gpu/demos/framework/window_win.cc b/gpu/demos/framework/window_win.cc
new file mode 100644
index 0000000..62b2771
--- /dev/null
+++ b/gpu/demos/framework/window_win.cc
@@ -0,0 +1,100 @@
+// 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 "gpu/demos/framework/window.h"
+
+namespace {
+LRESULT CALLBACK WindowProc(HWND hwnd, UINT msg,
+                            WPARAM w_param, LPARAM l_param) {
+  LRESULT result = 0;
+  switch (msg) {
+    case WM_CLOSE:
+      ::DestroyWindow(hwnd);
+      break;
+    case WM_DESTROY:
+      ::PostQuitMessage(0);
+      break;
+    case WM_ERASEBKGND:
+      break;
+    case WM_PAINT: {
+      gpu::demos::Window* window = reinterpret_cast<gpu::demos::Window*>(
+          GetWindowLongPtr(hwnd, GWL_USERDATA));
+      if (window != NULL) window->OnPaint();
+      ::ValidateRect(hwnd, NULL);
+      break;
+    }
+    default:
+      result = ::DefWindowProc(hwnd, msg, w_param, l_param);
+      break;
+  }
+  return result;
+}
+}  // namespace.
+
+namespace gpu {
+namespace demos {
+
+void Window::MainLoop() {
+  // Set this to the GWL_USERDATA so that it is available to WindowProc.
+  SetWindowLongPtr(window_handle_, GWL_USERDATA,
+                   reinterpret_cast<LONG_PTR>(this));
+
+  MSG msg;
+  bool done = false;
+  while (!done) {
+    while (::PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) {
+      if (msg.message == WM_QUIT) done = true;
+      ::TranslateMessage(&msg);
+      ::DispatchMessage(&msg);
+    }
+    // Message queue is empty and application has not quit yet - keep painting.
+    if (!done) ::UpdateWindow(window_handle_);
+  }
+}
+
+gfx::NativeWindow Window::CreateNativeWindow(const wchar_t* title,
+                                             int width, int height) {
+  WNDCLASS wnd_class = {0};
+  HINSTANCE instance = GetModuleHandle(NULL);
+  wnd_class.style = CS_OWNDC;
+  wnd_class.lpfnWndProc = WindowProc;
+  wnd_class.hInstance = instance;
+  wnd_class.hbrBackground =
+      reinterpret_cast<HBRUSH>(GetStockObject(BLACK_BRUSH));
+  wnd_class.lpszClassName = L"gpu_demo";
+  if (!RegisterClass(&wnd_class)) return NULL;
+
+  DWORD wnd_style = WS_VISIBLE | WS_POPUP | WS_BORDER | WS_SYSMENU | WS_CAPTION;
+  RECT wnd_rect;
+  wnd_rect.left = 0;
+  wnd_rect.top = 0;
+  wnd_rect.right = width;
+  wnd_rect.bottom = height;
+  AdjustWindowRect(&wnd_rect, wnd_style, FALSE);
+
+  HWND hwnd = CreateWindow(
+      wnd_class.lpszClassName,
+      title,
+      wnd_style,
+      0,
+      0,
+      wnd_rect.right - wnd_rect.left,
+      wnd_rect.bottom - wnd_rect.top,
+      NULL,
+      NULL,
+      instance,
+      NULL);
+  if (hwnd == NULL) return NULL;
+
+  ShowWindow(hwnd, SW_SHOWNORMAL);
+  return hwnd;
+}
+
+gfx::PluginWindowHandle Window::PluginWindow(gfx::NativeWindow hwnd) {
+  return hwnd;
+}
+
+}  // namespace demos
+}  // namespace gpu
+