Fix blurry content after disabling dev tools emulation

content/renderer/gpu/render_widget_compositor.cc

 // Copyright (c) 2013 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/gpu/render_widget_compositor.h"
 
 #include <stddef.h>
 #include <limits>
 #include <string>
 #include <utility>
@@ skipping 767 matching lines @@
   cc::LayerSelection empty_selection;
   layer_tree_host_->GetLayerTree()->RegisterSelection(empty_selection);
 }
 
 void RenderWidgetCompositor::setMutatorClient(
     std::unique_ptr<blink::WebCompositorMutatorClient> client) {
   TRACE_EVENT0("compositor-worker", "RenderWidgetCompositor::setMutatorClient");
   layer_tree_host_->SetLayerTreeMutator(std::move(client));
 }
 
+void RenderWidgetCompositor::forceRecalculateRasterScales() {
+  layer_tree_host_->SetNeedsRecalculateRasterScales();
+}
+
 static_assert(static_cast<cc::EventListenerClass>(
                   blink::WebEventListenerClass::TouchStartOrMove) ==
                   cc::EventListenerClass::kTouchStartOrMove,
               "EventListenerClass and WebEventListenerClass enums must match");
 static_assert(static_cast<cc::EventListenerClass>(
                   blink::WebEventListenerClass::MouseWheel) ==
                   cc::EventListenerClass::kMouseWheel,
               "EventListenerClass and WebEventListenerClass enums must match");
 
 static_assert(static_cast<cc::EventListenerProperties>(
@@ skipping 315 matching lines @@
     float device_scale) {
   layer_tree_host_->GetLayerTree()->SetPaintedDeviceScaleFactor(device_scale);
 }
 
 void RenderWidgetCompositor::SetDeviceColorSpace(
     const gfx::ColorSpace& color_space) {
   layer_tree_host_->GetLayerTree()->SetDeviceColorSpace(color_space);
 }
 
 }  // namespace content