Make various gfx classes more amenable to use as compile-time constants.

cc/output/renderer_pixeltest.cc

 // Copyright 2012 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 <stddef.h>
 #include <stdint.h>
 #include <memory>
 
 #include "base/message_loop/message_loop.h"
 #include "cc/output/gl_renderer.h"
@@ skipping 2885 matching lines @@
   }
 
   SkPaint blue_paint;
   blue_paint.setColor(SK_ColorBLUE);
   recording->add_draw_rectf_with_paint(blue_layer_rect1, blue_paint);
   recording->add_draw_rectf_with_paint(blue_layer_rect2, blue_paint);
   recording->Rerecord();
   scoped_refptr<FakeRasterSource> raster_source =
       FakeRasterSource::CreateFromRecordingSource(recording.get(), false);
 
-  gfx::Rect content_rect(
-      gfx::ScaleToEnclosingRect(layer_rect, contents_scale));
   gfx::Rect content_union_rect(
       gfx::ToEnclosingRect(gfx::ScaleRect(union_layer_rect, contents_scale)));
 
   // At a scale of 4x the rectangles with a width of 2.5 will take up 10 pixels,
   // so scale an additional 10x to make them 100x100.
   gfx::Transform quad_to_target_transform;
   quad_to_target_transform.Scale(10.0, 10.0);
   gfx::Rect quad_content_rect(gfx::Size(20, 20));
   SharedQuadState* blue_shared_state = CreateTestSharedQuadState(
       quad_to_target_transform, quad_content_rect, pass.get());
@@ skipping 258 matching lines @@
 
   EXPECT_TRUE(this->RunPixelTest(
       &pass_list, base::FilePath(FILE_PATH_LITERAL("spiral.png")),
       FuzzyPixelOffByOneComparator(true)));
 }
 
 #endif  // !defined(OS_ANDROID)
 
 }  // namespace
 }  // namespace cc