4 files changed, 8 insertions, 16 deletions
diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
index 435f5b1..c0eb866 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -554,15 +554,6 @@ WebPreferences WebContentsImpl::GetWebkitPrefs(RenderViewHost* rvh,
     prefs.accelerated_compositing_enabled = false;
     prefs.accelerated_2d_canvas_enabled = false;
   }
-  if (rvh->GetView()) {
-    gfx::Monitor monitor = gfx::Screen::GetMonitorNearestWindow(
-        rvh->GetView()->GetNativeView());
-    prefs.default_device_scale_factor =
-        static_cast<int>(monitor.device_scale_factor());
-  } else {
-    prefs.default_device_scale_factor =
-        gfx::Monitor::GetDefaultDeviceScaleFactor();;
-  }
 
   if (command_line.HasSwitch(switches::kDefaultTileWidth))
     prefs.default_tile_width =
diff --git a/content/common/view_messages.h b/content/common/view_messages.h
index 0d43b11..95f71e5 100644
--- a/content/common/view_messages.h
+++ b/content/common/view_messages.h
@@ -137,7 +137,6 @@ IPC_STRUCT_TRAITS_BEGIN(webkit_glue::WebPreferences)
   IPC_STRUCT_TRAITS_MEMBER(fantasy_font_family_map)
   IPC_STRUCT_TRAITS_MEMBER(default_font_size)
   IPC_STRUCT_TRAITS_MEMBER(default_fixed_font_size)
-  IPC_STRUCT_TRAITS_MEMBER(default_device_scale_factor)
   IPC_STRUCT_TRAITS_MEMBER(apply_default_device_scale_factor_in_compositor)
   IPC_STRUCT_TRAITS_MEMBER(minimum_font_size)
   IPC_STRUCT_TRAITS_MEMBER(minimum_logical_font_size)
diff --git a/content/renderer/render_view_impl.cc b/content/renderer/render_view_impl.cc
index 36a2413..d99ffb5 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -593,6 +593,7 @@ RenderViewImpl::RenderViewImpl(
   }
 
   g_view_map.Get().insert(std::make_pair(webview(), this));
+  webview()->setDeviceScaleFactor(device_scale_factor_);
   webkit_preferences_.Apply(webview());
   webview()->initializeMainFrame(this);
   if (!frame_name.empty())
@@ -2859,8 +2860,9 @@ void RenderViewImpl::ProcessViewLayoutFlags(const CommandLine& command_line) {
   webview()->enableFixedLayoutMode(enable_fixed_layout || enable_viewport);
   webview()->settings()->setFixedElementsLayoutRelativeToFrame(true);
   if (!enable_pinch &&
+      webview()->isAcceleratedCompositingActive() &&
       webkit_preferences_.apply_default_device_scale_factor_in_compositor &&
-      webkit_preferences_.default_device_scale_factor != 1) {
+      device_scale_factor_ != 1) {
     // Page scaling is disabled by default when applying a scale factor in the
     // compositor since they are currently incompatible.
     webview()->setPageScaleFactorLimits(1, 1);
@@ -2880,8 +2882,6 @@ void RenderViewImpl::ProcessViewLayoutFlags(const CommandLine& command_line) {
         webview()->setFixedLayoutSize(WebSize(width,height));
     }
   }
-  webview()->setDeviceScaleFactor(
-      webkit_preferences_.default_device_scale_factor);
 }
 
 void RenderViewImpl::didStartProvisionalLoad(WebFrame* frame) {
@@ -4891,9 +4891,11 @@ void RenderViewImpl::OnResize(const gfx::Size& new_size,
                               bool is_fullscreen) {
   if (webview()) {
     // This setting has no effect if fixed layout is not enabled.
-    if (webkit_preferences_.default_device_scale_factor)
+    DCHECK(device_scale_factor_);
+    if (device_scale_factor_) {
       webview()->settings()->setLayoutFallbackWidth(
-          new_size.width() / webkit_preferences_.default_device_scale_factor);
+          new_size.width() / device_scale_factor_);
+    }
     webview()->hidePopups();
     if (send_preferred_size_changes_) {
       webview()->mainFrame()->setCanHaveScrollbars(
diff --git a/content/renderer/render_widget.cc b/content/renderer/render_widget.cc
index 69e7d73..64cd94a 100644
--- a/content/renderer/render_widget.cc
+++ b/content/renderer/render_widget.cc
@@ -115,7 +115,7 @@ RenderWidget::RenderWidget(WebKit::WebPopupType popup_type,
   has_disable_gpu_vsync_switch_ = CommandLine::ForCurrentProcess()->HasSwitch(
       switches::kDisableGpuVsync);
 #if defined(OS_CHROMEOS) || defined(OS_MACOSX)
-  device_scale_factor_ = screen_info.verticalDPI / kStandardDPI;
+  device_scale_factor_ = std::max(1, screen_info.verticalDPI / kStandardDPI);
 #endif
 }