gfx: Make conversions from Size to SizeF be explicit.

cc/output/software_renderer_unittest.cc

Index: cc/output/software_renderer_unittest.cc
diff --git a/cc/output/software_renderer_unittest.cc b/cc/output/software_renderer_unittest.cc
index f587718eb7026bacf096bb2490cf469e4748ce23..488cf344c6392c959fa7a5bc1dcf8d648d3be887 100644
--- a/cc/output/software_renderer_unittest.cc
+++ b/cc/output/software_renderer_unittest.cc
@@ -187,26 +187,14 @@ TEST_F(SoftwareRendererTest, TileQuad) {
                             0);
   TileDrawQuad* inner_quad =
       root_render_pass->CreateAndAppendDrawQuad<TileDrawQuad>();
-  inner_quad->SetNew(shared_quad_state,
-                     inner_rect,
-                     inner_rect,
-                     inner_rect,
-                     resource_cyan,
-                     gfx::RectF(inner_size),
-                     inner_size,
-                     false,
-                     false);
+  inner_quad->SetNew(shared_quad_state, inner_rect, inner_rect, inner_rect,
+                     resource_cyan, gfx::RectF(gfx::SizeF(inner_size)),
+                     inner_size, false, false);
   TileDrawQuad* outer_quad =
       root_render_pass->CreateAndAppendDrawQuad<TileDrawQuad>();
-  outer_quad->SetNew(shared_quad_state,
-                     outer_rect,
-                     outer_rect,
-                     outer_rect,
-                     resource_yellow,
-                     gfx::RectF(outer_size),
-                     outer_size,
-                     false,
-                     false);
+  outer_quad->SetNew(shared_quad_state, outer_rect, outer_rect, outer_rect,
+                     resource_yellow, gfx::RectF(gfx::SizeF(outer_size)),
+                     outer_size, false, false);
 
   RenderPassList list;
   list.push_back(root_render_pass.Pass());
@@ -266,15 +254,9 @@ TEST_F(SoftwareRendererTest, TileQuadVisibleRect) {
                             0);
   TileDrawQuad* quad =
       root_render_pass->CreateAndAppendDrawQuad<TileDrawQuad>();
-  quad->SetNew(shared_quad_state,
-               tile_rect,
-               tile_rect,
-               tile_rect,
-               resource_cyan,
-               gfx::RectF(tile_size),
-               tile_size,
-               false,
-               false);
+  quad->SetNew(shared_quad_state, tile_rect, tile_rect, tile_rect,
+               resource_cyan, gfx::RectF(gfx::SizeF(tile_size)), tile_size,
+               false, false);
   quad->visible_rect = visible_rect;
 
   RenderPassList list;