Fix moving the mouse between two displays after the secondary display becomes primary.

ash/display/display_manager.cc

Index: ash/display/display_manager.cc
diff --git a/ash/display/display_manager.cc b/ash/display/display_manager.cc
index e3e3917654e4af4f113355c1fd918eb1e0c6e389..0f138a0c06576d0860e69a3ab9dd9001de266f6a 100644
--- a/ash/display/display_manager.cc
+++ b/ash/display/display_manager.cc
@@ -324,7 +324,7 @@ void DisplayManager::SetOverscanInsets(int64_t display_id,
   }
   if (update) {
     AddMirrorDisplayInfoIfAny(&display_info_list);
-    UpdateDisplays(display_info_list);
+    UpdateDisplaysTo(display_info_list);
   } else {
     display_info_[display_id].SetOverscanInsets(insets_in_dip);
   }
@@ -352,7 +352,7 @@ void DisplayManager::SetDisplayRotation(int64_t display_id,
   }
   if (is_active) {
     AddMirrorDisplayInfoIfAny(&display_info_list);
-    UpdateDisplays(display_info_list);
+    UpdateDisplaysTo(display_info_list);
   } else if (display_info_.find(display_id) != display_info_.end()) {
     // Inactive displays can reactivate, ensure they have been updated.
     display_info_[display_id].SetRotation(rotation, source);
@@ -397,7 +397,7 @@ bool DisplayManager::SetDisplayMode(int64_t display_id,
   }
   if (display_property_changed) {
     AddMirrorDisplayInfoIfAny(&display_info_list);
-    UpdateDisplays(display_info_list);
+    UpdateDisplaysTo(display_info_list);
   }
   if (resolution_changed && IsInUnifiedMode()) {
     ReconfigureDisplays();
@@ -632,7 +632,7 @@ void DisplayManager::OnNativeDisplaysChanged(
   }
 #endif
 
-  UpdateDisplays(new_display_info_list);
+  UpdateDisplaysTo(new_display_info_list);
 }
 
 void DisplayManager::UpdateDisplays() {
@@ -640,10 +640,10 @@ void DisplayManager::UpdateDisplays() {
   for (const auto& display : active_display_list_)
     display_info_list.push_back(GetDisplayInfo(display.id()));
   AddMirrorDisplayInfoIfAny(&display_info_list);
-  UpdateDisplays(display_info_list);
+  UpdateDisplaysTo(display_info_list);
 }
 
-void DisplayManager::UpdateDisplays(
+void DisplayManager::UpdateDisplaysTo(
     const std::vector<DisplayInfo>& updated_display_info_list) {
 #if defined(OS_WIN)
   DCHECK_EQ(1u, updated_display_info_list.size()) <<
@@ -971,7 +971,7 @@ void DisplayManager::AddRemoveDisplay() {
   num_connected_displays_ = new_display_info_list.size();
   mirroring_display_id_ = gfx::Display::kInvalidDisplayID;
   software_mirroring_display_list_.clear();
-  UpdateDisplays(new_display_info_list);
+  UpdateDisplaysTo(new_display_info_list);
 }
 
 void DisplayManager::ToggleDisplayScaleFactor() {
@@ -985,7 +985,7 @@ void DisplayManager::ToggleDisplayScaleFactor() {
     new_display_info_list.push_back(display_info);
   }
   AddMirrorDisplayInfoIfAny(&new_display_info_list);
-  UpdateDisplays(new_display_info_list);
+  UpdateDisplaysTo(new_display_info_list);
 }
 
 #if defined(OS_CHROMEOS)
@@ -1025,7 +1025,7 @@ void DisplayManager::ReconfigureDisplays() {
     display_info_list.push_back(GetDisplayInfo(display.id()));
   mirroring_display_id_ = gfx::Display::kInvalidDisplayID;
   software_mirroring_display_list_.clear();
-  UpdateDisplays(display_info_list);
+  UpdateDisplaysTo(display_info_list);
 }
 
 bool DisplayManager::UpdateDisplayBounds(int64_t display_id,