gfx: Make conversions from Size to SizeF be explicit.

chrome/browser/thumbnails/simple_thumbnail_crop_unittest.cc

Index: chrome/browser/thumbnails/simple_thumbnail_crop_unittest.cc
diff --git a/chrome/browser/thumbnails/simple_thumbnail_crop_unittest.cc b/chrome/browser/thumbnails/simple_thumbnail_crop_unittest.cc
index 1fe9d6f75794bd07a6b4feac2435fd9c156ebe63..e7c7a2b8943ac26c526e73569293ec72d1c365ae 100644
--- a/chrome/browser/thumbnails/simple_thumbnail_crop_unittest.cc
+++ b/chrome/browser/thumbnails/simple_thumbnail_crop_unittest.cc
@@ -110,8 +110,7 @@ TEST_F(SimpleThumbnailCropTest, GetClippedBitmap_NonSquareOutput) {
 
 TEST_F(SimpleThumbnailCropTest, GetCanvasCopyInfo) {
   gfx::Size thumbnail_size(200, 120);
-  gfx::Size expected_2x_size =
-      gfx::ToFlooredSize(gfx::ScaleSize(thumbnail_size, 2.0));
+  gfx::Size expected_2x_size = gfx::ScaleToFlooredSize(thumbnail_size, 2.0);
   float desired_aspect =
       static_cast<float>(thumbnail_size.width()) / thumbnail_size.height();
   scoped_refptr<thumbnails::ThumbnailingAlgorithm> algorithm(
@@ -172,8 +171,7 @@ TEST_F(SimpleThumbnailCropTest, GetCanvasCopyInfoDifferentScales) {
   gfx::Rect clipping_rect_result;
   gfx::Size target_size_result;
 
-  gfx::Size expected_2x_size =
-      gfx::ToFlooredSize(gfx::ScaleSize(thumbnail_size, 2.0));
+  gfx::Size expected_2x_size = gfx::ScaleToFlooredSize(thumbnail_size, 2.0);
 
   // Test at 1x scale. Expect a 2x thumbnail (we do this for quality).
   algorithm->GetCanvasCopyInfo(gfx::Size(400, 210), ui::SCALE_FACTOR_100P,
@@ -186,8 +184,7 @@ TEST_F(SimpleThumbnailCropTest, GetCanvasCopyInfoDifferentScales) {
   EXPECT_EQ(expected_2x_size, target_size_result);
 
   // Test at 3x scale.
-  gfx::Size expected_3x_size =
-      gfx::ToFlooredSize(gfx::ScaleSize(thumbnail_size, 3.0));
+  gfx::Size expected_3x_size = gfx::ScaleToFlooredSize(thumbnail_size, 3.0);
   algorithm->GetCanvasCopyInfo(gfx::Size(400, 210), ui::SCALE_FACTOR_300P,
                                &clipping_rect_result, &target_size_result);
   EXPECT_EQ(expected_3x_size, target_size_result);