Do not show the mouse cursor when the display is rotated in TouchView

ash/display/display_controller.cc

Index: ash/display/display_controller.cc
diff --git a/ash/display/display_controller.cc b/ash/display/display_controller.cc
index 5d5144b7064bff010abc48a7b9518876381e0d49..9cdd3780a6bf29e6e5ebaa616ba916907eb03e77 100644
--- a/ash/display/display_controller.cc
+++ b/ash/display/display_controller.cc
@@ -30,6 +30,7 @@
 #include "ui/aura/client/capture_client.h"
 #include "ui/aura/client/focus_client.h"
 #include "ui/aura/client/screen_position_client.h"
+#include "ui/aura/env.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/aura/window_property.h"
@@ -586,25 +587,33 @@ void DisplayController::EnsurePointerInDisplays() {
 #if defined(USE_OZONE)
   gfx::Point target_location_in_screen = target_location_in_root;
   ::wm::ConvertPointToScreen(dst_root_window, &target_location_in_screen);
-  int64 target_display_id =
-      display_manager->FindDisplayContainingPoint(target_location_in_screen)
-          .id();
+  const gfx::Display& target_display =
+      display_manager->FindDisplayContainingPoint(target_location_in_screen);
+  int64 target_display_id = target_display.id();
 
   // Do not move the cursor if the cursor's location did not change. This avoids
-  // moving (and showing) the cursor on startup.
-  // - |cursor_location_in_screen_coords_for_restore_| is checked to ensure that
-  //   the cursor is moved when the cursor's native position does not change but
-  //   the scale factor or rotation of the display it is on have changed.
-  // - |cursor_display_id_for_restore_| is checked to ensure that the cursor is
-  //   moved when the cursor's native position and screen position do not change
-  //   but the display that it is on has changed. This occurs when swapping the
-  //   primary display.
+  // moving (and showing) the cursor:
+  // - At startup.
+  // - When the device is rotated in maximized mode.
+  // |cursor_display_id_for_restore_| is checked to ensure that the cursor is
+  // moved when the cursor's native position does not change but the display
+  // that it is on has changed. This occurs when swapping the primary display.
   if (target_location_in_native !=
           cursor_location_in_native_coords_for_restore_ ||
-      target_location_in_screen !=
-          cursor_location_in_screen_coords_for_restore_ ||
       target_display_id != cursor_display_id_for_restore_) {
     dst_root_window->MoveCursorTo(target_location_in_root);
+  } else if (target_location_in_screen !=
+             cursor_location_in_screen_coords_for_restore_) {
+    // The cursor's native position did not change but its screen position did
+    // change. This occurs when the scale factor or the rotation of the display
+    // that the cursor is on changes.
+    Shell::GetInstance()->cursor_manager()->SetDisplay(target_display);
+
+    // Dispatch a synthetic mouse move. Synthetic mouse moves do not affect the
+    // cursor's visibility.

[sadrul, 2015/03/04 00:53:49]

Can you update the comment to explain why we want a synth mouse-move to be
dispatched?

+    aura::Env::GetInstance()->set_last_mouse_location(
+        target_location_in_screen);
+    dst_root_window->GetHost()->dispatcher()->PostSynthesizeMouseMove();
   }
 #else
   dst_root_window->MoveCursorTo(target_location_in_root);