Removed "compositor" child window that was created by the GPU process.

ui/gfx/gl/gl_context_egl.cc

Index: ui/gfx/gl/gl_context_egl.cc
===================================================================
--- ui/gfx/gl/gl_context_egl.cc	(revision 83213)
+++ ui/gfx/gl/gl_context_egl.cc	(working copy)
@@ -111,9 +111,20 @@
   return true;
 }
 
+void GLContextEGL::ReleaseCurrent() {
+  if (!IsCurrent())
+    return;
+
+  eglMakeCurrent(GLSurfaceEGL::GetDisplay(),
+                 EGL_NO_SURFACE,
+                 EGL_NO_SURFACE,
+                 EGL_NO_CONTEXT);
+}
+
 bool GLContextEGL::IsCurrent() {
   DCHECK(context_);
-  return context_ == eglGetCurrentContext();
+  return context_ == eglGetCurrentContext() &&
+      surface_->GetHandle() == eglGetCurrentSurface(EGL_DRAW);
 }
 
 bool GLContextEGL::IsOffscreen() {
@@ -131,6 +142,11 @@
   return surface_->GetSize();
 }
 
+GLSurface* GLContextEGL::GetSurface() {
+  // TODO(apatrick): remove this from GLContext interface.
+  return surface_.get();
+}
+
 void* GLContextEGL::GetHandle() {
   return context_;
 }