Implements core logic for Pixel Canvas

ui/compositor/compositor.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 "ui/compositor/compositor.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <deque>
@@ skipping 305 matching lines @@
     size_ = size_in_pixel;
     host_->SetViewportSize(size_in_pixel);
     root_web_layer_->SetBounds(size_in_pixel);
     // TODO(fsamuel): Get rid of ContextFactoryPrivate.
     if (context_factory_private_)
       context_factory_private_->ResizeDisplay(this, size_in_pixel);
   }
   if (device_scale_factor_ != scale) {
     device_scale_factor_ = scale;
     host_->SetDeviceScaleFactor(scale);
+    if (IsPixelCanvasRecordingEnabled())

[danakj, 2017/07/21 17:29:39]

Can this be passed to the Constructor instead so unit tests can set it without
having to muck with trying to intercept command line?

[malaykeshav, 2017/07/21 23:30:17]

Done

+      host_->SetRecordingScaleFactor(scale);
     if (root_layer_)
       root_layer_->OnDeviceScaleFactorChanged(scale);
   }
 }
 
 void Compositor::SetDisplayColorSpace(const gfx::ColorSpace& color_space) {
   blending_color_space_ = color_space;
   output_color_space_ = blending_color_space_;
   if (base::CommandLine::ForCurrentProcess()->HasSwitch(switches::kEnableHDR)) {
     blending_color_space_ = gfx::ColorSpace::CreateExtendedSRGB();
@@ skipping 249 matching lines @@
 void Compositor::TimeoutLocks() {
   // Make a copy, we're going to cause |active_locks_| to become
   // empty.
   std::vector<CompositorLock*> locks = active_locks_;
   for (auto* lock : locks)
     lock->TimeoutLock();
   DCHECK(active_locks_.empty());
 }
 
 }  // namespace ui