Enable hidpi on Linux, refactor a bit on Windows to share

content/browser/renderer_host/legacy_render_widget_host_win.cc

Index: content/browser/renderer_host/legacy_render_widget_host_win.cc
diff --git a/content/browser/renderer_host/legacy_render_widget_host_win.cc b/content/browser/renderer_host/legacy_render_widget_host_win.cc
index 327e0b9b43e73df9a7280366ecd5d05eed899ba2..af2ccfa2b390f751224628e2d24508a2a6ad9563 100644
--- a/content/browser/renderer_host/legacy_render_widget_host_win.cc
+++ b/content/browser/renderer_host/legacy_render_widget_host_win.cc
@@ -17,8 +17,8 @@
 #include "ui/base/view_prop.h"
 #include "ui/base/win/internal_constants.h"
 #include "ui/base/win/window_event_target.h"
+#include "ui/gfx/dpi.h"
 #include "ui/gfx/geometry/rect.h"
-#include "ui/gfx/win/dpi.h"
 
 namespace content {
 
@@ -80,7 +80,7 @@ void LegacyRenderWidgetHostHWND::Hide() {
 }
 
 void LegacyRenderWidgetHostHWND::SetBounds(const gfx::Rect& bounds) {
-  gfx::Rect bounds_in_pixel = gfx::win::DIPToScreenRect(bounds);
+  gfx::Rect bounds_in_pixel = gfx::DIPToScreenRect(bounds);
   ::SetWindowPos(hwnd(), NULL, bounds_in_pixel.x(), bounds_in_pixel.y(),
                  bounds_in_pixel.width(), bounds_in_pixel.height(),
                  SWP_NOREDRAW);