Respect the disabled extension list during binding initialization.

ui/gl/gl_bindings_autogen_wgl.cc

Index: ui/gl/gl_bindings_autogen_wgl.cc
diff --git a/ui/gl/gl_bindings_autogen_wgl.cc b/ui/gl/gl_bindings_autogen_wgl.cc
index b70f929286b13dc8de1e0116dbe298a427db6637..412ae1efb6af331245e675b7b0c3a36476dcfe5b 100644
--- a/ui/gl/gl_bindings_autogen_wgl.cc
+++ b/ui/gl/gl_bindings_autogen_wgl.cc
@@ -55,21 +55,24 @@ void DriverWGL::InitializeStaticBindings() {
   fn.wglSwapIntervalEXTFn = 0;
   fn.wglSwapLayerBuffersFn = reinterpret_cast<wglSwapLayerBuffersProc>(
       GetGLProcAddress("wglSwapLayerBuffers"));
-  std::string extensions(GetPlatformExtensions());
-  extensions += " ";
-  ALLOW_UNUSED_LOCAL(extensions);
+}
 
+void DriverWGL::InitializeExtensionBindings(
+    const std::set<std::string>& enabled_extensions) {
   ext.b_WGL_ARB_extensions_string =
-      extensions.find("WGL_ARB_extensions_string ") != std::string::npos;
+      enabled_extensions.find("WGL_ARB_extensions_string") !=
+      enabled_extensions.end();
   ext.b_WGL_ARB_pbuffer =
-      extensions.find("WGL_ARB_pbuffer ") != std::string::npos;
+      enabled_extensions.find("WGL_ARB_pbuffer") != enabled_extensions.end();
   ext.b_WGL_ARB_pixel_format =
-      extensions.find("WGL_ARB_pixel_format ") != std::string::npos;
+      enabled_extensions.find("WGL_ARB_pixel_format") !=
+      enabled_extensions.end();
   ext.b_WGL_EXT_extensions_string =
-      extensions.find("WGL_EXT_extensions_string ") != std::string::npos;
+      enabled_extensions.find("WGL_EXT_extensions_string") !=
+      enabled_extensions.end();
   ext.b_WGL_EXT_swap_control =
-      extensions.find("WGL_EXT_swap_control ") != std::string::npos;
-
+      enabled_extensions.find("WGL_EXT_swap_control") !=
+      enabled_extensions.end();
   debug_fn.wglChoosePixelFormatARBFn = 0;
   if (ext.b_WGL_ARB_pixel_format) {
     fn.wglChoosePixelFormatARBFn =