Fix blurry content after disabling dev tools emulation

cc/blimp/layer_tree_host_remote.cc

 // Copyright 2016 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 "cc/blimp/layer_tree_host_remote.h"
 
 #include "base/atomic_sequence_num.h"
 #include "base/memory/ptr_util.h"
 #include "cc/animation/animation_host.h"
 #include "cc/blimp/compositor_proto_state.h"
@@ skipping 127 matching lines @@
 }
 
 void LayerTreeHostRemote::SetNeedsUpdateLayers() {
   MainFrameRequested(FramePipelineStage::UPDATE_LAYERS);
 }
 
 void LayerTreeHostRemote::SetNeedsCommit() {
   MainFrameRequested(FramePipelineStage::COMMIT);
 }
 
+void LayerTreeHostRemote::SetNeedsRecalculateRasterScales() {
+  // This is used by devtools to reraster content after changing device
+  // emulation modes, so doesn't need to be supported by Blimp.
+}
+
 bool LayerTreeHostRemote::BeginMainFrameRequested() const {
   return requested_pipeline_stage_for_next_frame_ != FramePipelineStage::NONE;
 }
 
 bool LayerTreeHostRemote::CommitRequested() const {
   return requested_pipeline_stage_for_next_frame_ == FramePipelineStage::COMMIT;
 }
 
 void LayerTreeHostRemote::SetDeferCommits(bool defer_commits) {
   defer_commits_ = defer_commits;
@@ skipping 248 matching lines @@
   client_->DidCommit();
   client_->DidBeginMainFrame();
 }
 
 void LayerTreeHostRemote::DispatchDrawAndSwapCallbacks() {
   client_->DidCommitAndDrawFrame();
   client_->DidCompleteSwapBuffers();
 }
 
 }  // namespace cc