Switch to standard integer types in ash/.

ash/accelerators/accelerator_commands.cc

Index: ash/accelerators/accelerator_commands.cc
diff --git a/ash/accelerators/accelerator_commands.cc b/ash/accelerators/accelerator_commands.cc
index 83e5d26da67e54cc64b71153a6a45342691c6b42..23a46e36febc6b7111ccbe39fed4c27d7c70970c 100644
--- a/ash/accelerators/accelerator_commands.cc
+++ b/ash/accelerators/accelerator_commands.cc
@@ -72,9 +72,9 @@ bool ZoomInternalDisplay(bool up) {
 
   DisplayManager* display_manager = Shell::GetInstance()->display_manager();
 
-  int64 display_id = display_manager->IsInUnifiedMode()
-                         ? DisplayManager::kUnifiedDisplayId
-                         : display_manager->GetDisplayIdForUIScaling();
+  int64_t display_id = display_manager->IsInUnifiedMode()
+                           ? DisplayManager::kUnifiedDisplayId
+                           : display_manager->GetDisplayIdForUIScaling();
   const DisplayInfo& display_info = display_manager->GetDisplayInfo(display_id);
   DisplayMode mode;