Remove GetPlatformDefaultEGLNativeDisplay() function.

ui/gl/egl_api_unittest.cc

Index: ui/gl/egl_api_unittest.cc
diff --git a/ui/gl/egl_api_unittest.cc b/ui/gl/egl_api_unittest.cc
index 42ce7fc62c8e59a64e27ed05cc8ec5274fc8bf38..b9dbd15a034f5d8224cddae2aee5feaff4fcc131 100644
--- a/ui/gl/egl_api_unittest.cc
+++ b/ui/gl/egl_api_unittest.cc
@@ -7,6 +7,7 @@
 #include "base/command_line.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/gl/gl_egl_api_implementation.h"
+#include "ui/gl/gl_surface_egl.h"
 #include "ui/gl/gl_switches.h"
 
 namespace gl {
@@ -42,6 +43,8 @@ class EGLApiTest : public testing::Test {
       api_->InitializeWithCommandLine(&g_driver_egl, command_line);
     else
       api_->Initialize(&g_driver_egl);
+    g_driver_egl.InitializeClientExtensionBindings();
+    GLSurfaceEGL::InitializeDisplay(EGL_DEFAULT_DISPLAY);
     g_driver_egl.InitializeExtensionBindings();
   }