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

cc/trees/layer_tree_impl_unittest.cc

 // Copyright 2014 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/trees/layer_tree_impl.h"
 
 #include "cc/layers/heads_up_display_layer_impl.h"
 #include "cc/layers/layer.h"
 #include "cc/layers/solid_color_scrollbar_layer_impl.h"
 #include "cc/test/fake_impl_task_runner_provider.h"
@@ skipping 1618 matching lines @@
   ASSERT_TRUE(result_layer);
   EXPECT_EQ(12345, result_layer->id());
 
   // Check update of page scale factor on the active tree when page scale layer
   // is also the root layer.
   page_scale_factor *= 1.5f;
   host_impl().active_tree()->SetPageScaleOnActiveTree(page_scale_factor);
   EXPECT_EQ(host_impl().active_tree()->root_layer(),
             host_impl().active_tree()->PageScaleLayer());
 
-  test_point = gfx::Point(35, 35);
+  test_point = gfx::PointF(35.f, 35.f);
   test_point =
       gfx::ScalePoint(test_point, device_scale_factor * page_scale_factor);
   result_layer =
       host_impl().active_tree()->FindLayerThatIsHitByPointInTouchHandlerRegion(
           test_point);
   ASSERT_TRUE(result_layer);
   EXPECT_EQ(12345, result_layer->id());
 
-  test_point = gfx::Point(64, 64);
+  test_point = gfx::PointF(64.f, 64.f);
   test_point =
       gfx::ScalePoint(test_point, device_scale_factor * page_scale_factor);
   result_layer =
       host_impl().active_tree()->FindLayerThatIsHitByPointInTouchHandlerRegion(
           test_point);
   ASSERT_TRUE(result_layer);
   EXPECT_EQ(12345, result_layer->id());
 }
 
 TEST_F(LayerTreeImplTest, HitCheckingTouchHandlerRegionsForSimpleClippedLayer) {
@@ skipping 566 matching lines @@
   EXPECT_EQ(0u, host_impl().active_tree()->NumLayers());
   scoped_ptr<LayerImpl> root = LayerImpl::Create(host_impl().active_tree(), 1);
   root->AddChild(LayerImpl::Create(host_impl().active_tree(), 2));
   root->AddChild(LayerImpl::Create(host_impl().active_tree(), 3));
   root->child_at(1)->AddChild(LayerImpl::Create(host_impl().active_tree(), 4));
   EXPECT_EQ(4u, host_impl().active_tree()->NumLayers());
 }
 
 }  // namespace
 }  // namespace cc