add ash_resources.grd and necessary changes to use images in ash/resources

ash/display/multi_display_manager.cc

Index: ash/display/multi_display_manager.cc
diff --git a/ash/display/multi_display_manager.cc b/ash/display/multi_display_manager.cc
index 37509be0e82e2522f11a472ae805ca36da0b220d..71b4fe4baa2506ddef71191385cac20995f1187a 100644
--- a/ash/display/multi_display_manager.cc
+++ b/ash/display/multi_display_manager.cc
@@ -78,10 +78,14 @@ void MultiDisplayManager::InitInternalDisplayInfo() {
     return;
   std::vector<XID> outputs;
   ui::GetOutputDeviceHandles(&outputs);
-  std::vector<std::string> output_names = ui::GetOutputNames(outputs);
-  for (size_t i = 0; i < output_names.size(); ++i) {
+  // Output names are hardware specific and never changes.
+  output_names_ = ui::GetOutputNames(outputs);
+  for (size_t i = 0; i < output_names_.size(); ++i) {
     if (chromeos::OutputConfigurator::IsInternalOutputName(
-            output_names[i])) {
+            output_names_[i])) {
+      // Set internal as primary by default. This may be
+      // overritten by settings later.
+      primary_output_name_ = output_names_[i];
       XID internal_output = outputs[i];
       uint16 manufacturer_id = 0;
       uint32 serial_number = 0;
@@ -95,6 +99,13 @@ void MultiDisplayManager::InitInternalDisplayInfo() {
 #endif
 }
 
+void MultiDisplayManager::SetOutputNameForPrimaryDisplay(
+    const std::string& name) {
+  primary_output_name_ = name;
+  std::vector<gfx::Display> update = displays_;
+  OnNativeDisplaysChanged(displays_);
+}
+
 bool MultiDisplayManager::HasInternalDisplay() const {
   return internal_display_id_ != gfx::Display::kInvalidDisplayID;
 }
@@ -156,6 +167,8 @@ void MultiDisplayManager::OnNativeDisplaysChanged(
   } else {
     new_displays = updated_displays;
   }
+  // Move the primary display to the first if any.
+  MovePrimaryToFirst();
 
   size_t min = std::min(displays_.size(), new_displays.size());