Enable builtin Mojo JS modules in layout tests

content/renderer/render_view_impl.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/render_view_impl.h"
 
 #include <algorithm>
 #include <cmath>
 
 #include "base/auto_reset.h"
@@ skipping 2516 matching lines @@
 void RenderViewImpl::OnResetPageEncodingToDefault() {
   WebString no_encoding;
   webview()->setPageEncoding(no_encoding);
 }
 
 void RenderViewImpl::OnAllowBindings(int enabled_bindings_flags) {
   if ((enabled_bindings_flags & BINDINGS_POLICY_WEB_UI) &&
       !(enabled_bindings_ & BINDINGS_POLICY_WEB_UI)) {
     // WebUIExtensionData deletes itself when we're destroyed.
     new WebUIExtensionData(this);
+  }
+
+  // Enable Mojo bindings if either WebUI or Mojo bindings are being added to
+  // the policy and neither was previously present.
+  if (!(enabled_bindings_ & (BINDINGS_POLICY_WEB_UI | BINDINGS_POLICY_MOJO)) &&
+      (enabled_bindings_flags &
+          (BINDINGS_POLICY_WEB_UI | BINDINGS_POLICY_MOJO)) &&
+      GetMainRenderFrame()) {
     // MojoBindingsController deletes itself when we're destroyed.
     new MojoBindingsController(this);
   }
 
   enabled_bindings_ |= enabled_bindings_flags;
 
   // Keep track of the total bindings accumulated in this process.
   RenderProcess::current()->AddBindings(enabled_bindings_flags);
 }
 
@@ skipping 1162 matching lines @@
   if (IsUseZoomForDSFEnabled()) {
     compositor_->SetPaintedDeviceScaleFactor(device_scale_factor_);
     webview()->setZoomFactorForDeviceScaleFactor(
         device_scale_factor_);
   } else {
     webview()->setDeviceScaleFactor(device_scale_factor_);
   }
 }
 
 }  // namespace content