Fix blurry content after disabling dev tools emulation

cc/trees/layer_tree_host_in_process.cc

Index: cc/trees/layer_tree_host_in_process.cc
diff --git a/cc/trees/layer_tree_host_in_process.cc b/cc/trees/layer_tree_host_in_process.cc
index 4cb7d1b8dda3cbf9a6139ebdc5ae8c3d9392e29f..f980b489a44074c12908f8d2316ed967c7d96084 100644
--- a/cc/trees/layer_tree_host_in_process.cc
+++ b/cc/trees/layer_tree_host_in_process.cc
@@ -214,7 +214,6 @@ LayerTreeHostInProcess::LayerTreeHostInProcess(
       gpu_rasterization_histogram_recorded_(false),
       did_complete_scale_animation_(false),
       id_(s_layer_tree_host_sequence_number.GetNext() + 1),
-      next_commit_forces_redraw_(false),
       shared_bitmap_manager_(params->shared_bitmap_manager),
       gpu_memory_buffer_manager_(params->gpu_memory_buffer_manager),
       task_graph_runner_(params->task_graph_runner),
@@ -444,6 +443,10 @@ void LayerTreeHostInProcess::FinishCommitOnImplThread(
     sync_tree->ForceRedrawNextActivation();
     next_commit_forces_redraw_ = false;
   }
+  if (next_commit_forces_recalculate_raster_scales_) {
+    sync_tree->ForceRecalculateRasterScales();
+    next_commit_forces_recalculate_raster_scales_ = false;
+  }
 
   sync_tree->set_source_frame_number(SourceFrameNumber());
 
@@ -604,6 +607,11 @@ void LayerTreeHostInProcess::SetNeedsCommit() {
   swap_promise_manager_.NotifySwapPromiseMonitorsOfSetNeedsCommit();
 }
 
+void LayerTreeHostInProcess::SetNeedsRecalculateRasterScales() {
+  next_commit_forces_recalculate_raster_scales_ = true;
+  proxy_->SetNeedsCommit();
+}
+
 void LayerTreeHostInProcess::SetNeedsRedraw() {
   SetNeedsRedrawRect(gfx::Rect(layer_tree_->device_viewport_size()));
 }