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

cc/trees/layer_tree_host_unittest_copyrequest.cc

 // Copyright 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 "cc/layers/layer_iterator.h"
 #include "cc/output/copy_output_request.h"
 #include "cc/output/copy_output_result.h"
 #include "cc/test/fake_content_layer_client.h"
 #include "cc/test/fake_output_surface.h"
 #include "cc/test/fake_picture_layer.h"
@@ skipping 407 matching lines @@
   void SetupTree() override {
     root_ = FakePictureLayer::Create(layer_settings(), &client_);
     root_->SetBounds(gfx::Size(20, 20));
 
     parent_layer_ = FakePictureLayer::Create(layer_settings(), &client_);
     parent_layer_->SetBounds(gfx::Size(15, 15));
     parent_layer_->SetMasksToBounds(true);
     root_->AddChild(parent_layer_);
 
     copy_layer_ = FakePictureLayer::Create(layer_settings(), &client_);
-    copy_layer_->SetPosition(gfx::Point(15, 15));
+    copy_layer_->SetPosition(gfx::PointF(15.f, 15.f));
     copy_layer_->SetBounds(gfx::Size(10, 10));
     parent_layer_->AddChild(copy_layer_);
 
     layer_tree_host()->SetRootLayer(root_);
     LayerTreeHostCopyRequestTest::SetupTree();
   }
 
   void BeginTest() override {
     PostSetNeedsCommitToMainThread();
 
@@ skipping 653 matching lines @@
   int num_draws_;
   bool copy_happened_;
   bool draw_happened_;
 };
 
 SINGLE_AND_MULTI_THREAD_DIRECT_RENDERER_TEST_F(
     LayerTreeHostCopyRequestTestMultipleDrawsHiddenCopyRequest);
 
 }  // namespace
 }  // namespace cc