gfx: Make conversions from gfx::Point to PointF explicit.

ui/aura/window_tree_host.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/aura/window_tree_host.h"
 
 #include "base/thread_task_runner_handle.h"
 #include "base/trace_event/trace_event.h"
 #include "ui/aura/client/capture_client.h"
 #include "ui/aura/client/cursor_client.h"
@@ skipping 115 matching lines @@
   point->Offset(location.x(), location.y());
 }
 
 void WindowTreeHost::ConvertPointFromNativeScreen(gfx::Point* point) const {
   gfx::Point location = GetLocationOnNativeScreen();
   point->Offset(-location.x(), -location.y());
   ConvertPointFromHost(point);
 }
 
 void WindowTreeHost::ConvertPointToHost(gfx::Point* point) const {
-  gfx::Point3F point_3f(*point);
+  auto point_3f = gfx::Point3F(gfx::PointF(*point));
   GetRootTransform().TransformPoint(&point_3f);
   *point = gfx::ToFlooredPoint(point_3f.AsPointF());
 }
 
 void WindowTreeHost::ConvertPointFromHost(gfx::Point* point) const {
-  gfx::Point3F point_3f(*point);
+  auto point_3f = gfx::Point3F(gfx::PointF(*point));
   GetInverseRootTransform().TransformPoint(&point_3f);
   *point = gfx::ToFlooredPoint(point_3f.AsPointF());
 }
 
 void WindowTreeHost::SetCursor(gfx::NativeCursor cursor) {
   last_cursor_ = cursor;
   // A lot of code seems to depend on NULL cursors actually showing an arrow,
   // so just pass everything along to the host.
   SetCursorNative(cursor);
 }
@@ skipping 158 matching lines @@
   client::CursorClient* cursor_client = client::GetCursorClient(window());
   if (cursor_client) {
     const gfx::Display& display =
         gfx::Screen::GetScreenFor(window())->GetDisplayNearestWindow(window());
     cursor_client->SetDisplay(display);
   }
   dispatcher()->OnCursorMovedToRootLocation(root_location);
 }
 
 }  // namespace aura