Remove dependency on ui::ScaleFactor from ui/gfx

ui/views/win/hwnd_message_handler.cc

Index: ui/views/win/hwnd_message_handler.cc
diff --git a/ui/views/win/hwnd_message_handler.cc b/ui/views/win/hwnd_message_handler.cc
index ba8f4465c1e4b3b5499d5465359338530b31951a..253eb2254bdef26926cebc5d4a4ffe98913d721f 100644
--- a/ui/views/win/hwnd_message_handler.cc
+++ b/ui/views/win/hwnd_message_handler.cc
@@ -15,6 +15,7 @@
 #include "ui/base/events/event_utils.h"
 #include "ui/base/gestures/gesture_sequence.h"
 #include "ui/base/keycodes/keyboard_code_conversion_win.h"
+#include "ui/base/layout.h"
 #include "ui/base/touch/touch_enabled.h"
 #include "ui/base/win/mouse_wheel_util.h"
 #include "ui/base/win/shell.h"
@@ -1037,10 +1038,8 @@ void HWNDMessageHandler::ClientAreaSizeChanged() {
   gfx::Size s(std::max(0, static_cast<int>(r.right - r.left)),
               std::max(0, static_cast<int>(r.bottom - r.top)));
   delegate_->HandleClientSizeChanged(s);
-  if (use_layered_buffer_) {
-    layered_window_contents_.reset(
-        new gfx::Canvas(s, ui::SCALE_FACTOR_100P, false));
-  }
+  if (use_layered_buffer_)
+    layered_window_contents_.reset(new gfx::Canvas(s, 1.0f, false));
 }
 
 bool HWNDMessageHandler::GetClientAreaInsets(gfx::Insets* insets) const {