ozone: Use host coordinates in UIControlsOzone

We're dispatching to WindowTreeHost in the wrong space. Looks like the
transform is generally identity in tests, but let's still make sure to
use the right space.

BUG=none
TEST=interactive_ui_tests in chromeos ozone build

Review URL: https://codereview.chromium.org/774043002

Cr-Commit-Position: refs/heads/master@{#308148}

ui/aura/test/ui_controls_factory_ozone.cc

@@ -100,14 +100,18 @@ class UIControlsOzone : public ui_controls::UIControlsAura {
       screen_position_client->ConvertPointFromScreen(host_->window(),
                                                      &root_location);
     }
-    gfx::Point root_current_location =
-        QueryLatestMousePositionRequestInHost(host_);
-    host_->ConvertPointFromHost(&root_current_location);
+
+    gfx::Point host_location = root_location;
+    host_->ConvertPointToHost(&host_location);
+
+    ui::EventType event_type;
 
     if (button_down_mask_)
-      PostMouseEvent(ui::ET_MOUSE_DRAGGED, root_location, 0, 0);
+      event_type = ui::ET_MOUSE_DRAGGED;
     else
-      PostMouseEvent(ui::ET_MOUSE_MOVED, root_location, 0, 0);
+      event_type = ui::ET_MOUSE_MOVED;
+
+    PostMouseEvent(event_type, host_location, 0, 0);
 
     RunClosureAfterAllPendingUIEvents(closure);
     return true;
@@ -120,12 +124,17 @@ class UIControlsOzone : public ui_controls::UIControlsAura {
       ui_controls::MouseButton type,
       int state,
       const base::Closure& closure) override {
-    gfx::Point loc = aura::Env::GetInstance()->last_mouse_location();
+    gfx::Point root_location = aura::Env::GetInstance()->last_mouse_location();
     aura::client::ScreenPositionClient* screen_position_client =
         aura::client::GetScreenPositionClient(host_->window());
     if (screen_position_client) {
-      screen_position_client->ConvertPointFromScreen(host_->window(), &loc);
+      screen_position_client->ConvertPointFromScreen(host_->window(),
+                                                     &root_location);
     }
+
+    gfx::Point host_location = root_location;
+    host_->ConvertPointToHost(&host_location);
+
     int flag = 0;
 
     switch (type) {
@@ -145,12 +154,13 @@ class UIControlsOzone : public ui_controls::UIControlsAura {
 
     if (state & ui_controls::DOWN) {
       button_down_mask_ |= flag;
-      PostMouseEvent(ui::ET_MOUSE_PRESSED, loc, button_down_mask_ | flag, flag);
+      PostMouseEvent(ui::ET_MOUSE_PRESSED, host_location,
+                     button_down_mask_ | flag, flag);
     }
     if (state & ui_controls::UP) {
       button_down_mask_ &= ~flag;
-      PostMouseEvent(
-          ui::ET_MOUSE_RELEASED, loc, button_down_mask_ | flag, flag);
+      PostMouseEvent(ui::ET_MOUSE_RELEASED, host_location,
+                     button_down_mask_ | flag, flag);
     }
 
     RunClosureAfterAllPendingUIEvents(closure);
@@ -195,25 +205,21 @@ class UIControlsOzone : public ui_controls::UIControlsAura {
   }
 
   void PostMouseEvent(ui::EventType type,
-                      const gfx::PointF& location,
+                      const gfx::PointF& host_location,
                       int flags,
                       int changed_button_flags) {
     base::MessageLoop::current()->PostTask(
         FROM_HERE,
-        base::Bind(&UIControlsOzone::PostMouseEventTask,
-                   base::Unretained(this),
-                   type,
-                   location,
-                   flags,
-                   changed_button_flags));
+        base::Bind(&UIControlsOzone::PostMouseEventTask, base::Unretained(this),
+                   type, host_location, flags, changed_button_flags));
   }
 
   void PostMouseEventTask(ui::EventType type,
-                          const gfx::PointF& location,
+                          const gfx::PointF& host_location,
                           int flags,
                           int changed_button_flags) {
-    ui::MouseEvent mouse_event(
-        type, location, location, flags, changed_button_flags);
+    ui::MouseEvent mouse_event(type, host_location, host_location, flags,
+                               changed_button_flags);
 
     // This hack is necessary to set the repeat count for clicks.
     ui::MouseEvent mouse_event2(&mouse_event);