Revert 120111 - Defer render_widget draw until host window is available

content/renderer/render_view_impl.cc

Index: content/renderer/render_view_impl.cc
===================================================================
--- content/renderer/render_view_impl.cc	(revision 120128)
+++ content/renderer/render_view_impl.cc	(working copy)
@@ -397,8 +397,6 @@
       cached_is_main_frame_pinned_to_right_(false),
       cached_has_main_frame_horizontal_scrollbar_(false),
       cached_has_main_frame_vertical_scrollbar_(false),
-      context_has_swapbuffers_complete_callback_(false),
-      queried_for_swapbuffers_complete_callback_(false),
       ALLOW_THIS_IN_INITIALIZER_LIST(cookie_jar_(this)),
       geolocation_dispatcher_(NULL),
       speech_input_dispatcher_(NULL),
@@ -4497,21 +4495,12 @@
   if (WebWidgetHandlesCompositorScheduling())
     return false;
 
-  if (queried_for_swapbuffers_complete_callback_)
-    return context_has_swapbuffers_complete_callback_;
-
-  queried_for_swapbuffers_complete_callback_ = true;
-
   WebKit::WebGraphicsContext3D* context = webview()->graphicsContext3D();
-  if (context) {
-    context->makeContextCurrent();
-    std::string extensions(context->getRequestableExtensionsCHROMIUM().utf8());
-    context_has_swapbuffers_complete_callback_ =
-        extensions.find("GL_CHROMIUM_swapbuffers_complete_callback")
-            != std::string::npos;
-  }
-
-  return context_has_swapbuffers_complete_callback_;
+  if (!context)
+    return false;
+  std::string extensions(context->getRequestableExtensionsCHROMIUM().utf8());
+  return extensions.find("GL_CHROMIUM_swapbuffers_complete_callback") !=
+      std::string::npos;
 }
 
 void RenderViewImpl::OnSetFocus(bool enable) {