Use inner HWND for accelerated rendering on windows

app/gfx/gl/gl_context_egl.cc

Index: app/gfx/gl/gl_context_egl.cc
===================================================================
--- app/gfx/gl/gl_context_egl.cc	(revision 66779)
+++ app/gfx/gl/gl_context_egl.cc	(working copy)
@@ -246,6 +246,13 @@
   return true;
 }
 
+void NativeViewEGLContext::SetSize(gfx::Size size) {
+  HWND hwnd = static_cast<HWND>(window_);
+  UINT swp_flags = SWP_NOSENDCHANGING | SWP_NOOWNERZORDER | SWP_NOCOPYBITS |
+    SWP_NOMOVE | SWP_NOZORDER | SWP_NOACTIVATE | SWP_DEFERERASE;
+  SetWindowPos(hwnd, NULL, 0, 0, size.width(), size.height(), swp_flags);
+}
+
 gfx::Size NativeViewEGLContext::GetSize() {
 #if defined(OS_WIN)
   RECT rect;