Revert 167255 - ui: Remove gfx::Size::ClampToNonNegative, prevent negative sizes always.

cc/draw_quad_unittest.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 "cc/draw_quad.h"
 
 #include "cc/checkerboard_draw_quad.h"
 #include "cc/debug_border_draw_quad.h"
 #include "cc/io_surface_draw_quad.h"
 #include "cc/render_pass_draw_quad.h"
@@ skipping 212 matching lines @@
     CREATE_SHARED_STATE();
     CREATE_QUAD_2(StreamVideoDrawQuad, textureId, matrix);
     EXPECT_EQ(textureId, copyQuad->textureId());
     EXPECT_EQ(matrix, copyQuad->matrix());
 }
 
 TEST(DrawQuadTest, copyTextureDrawQuad)
 {
     unsigned resourceId = 82;
     bool premultipliedAlpha = true;
-    gfx::RectF uvRect(0.5, 224, 51, 36);
+    gfx::RectF uvRect(0.5, 224, -51, 36);
     bool flipped = true;
 
     CREATE_SHARED_STATE();
     CREATE_QUAD_4(TextureDrawQuad, resourceId, premultipliedAlpha, uvRect, flipped);
     EXPECT_EQ(resourceId, copyQuad->resourceId());
     EXPECT_EQ(premultipliedAlpha, copyQuad->premultipliedAlpha());
     EXPECT_FLOAT_RECT_EQ(uvRect, copyQuad->uvRect());
     EXPECT_EQ(flipped, copyQuad->flipped());
 }
 
@@ skipping 47 matching lines @@
     EXPECT_EQ(uPlane.resourceId, copyQuad->uPlane().resourceId);
     EXPECT_EQ(uPlane.size, copyQuad->uPlane().size);
     EXPECT_EQ(uPlane.format, copyQuad->uPlane().format);
     EXPECT_EQ(vPlane.resourceId, copyQuad->vPlane().resourceId);
     EXPECT_EQ(vPlane.size, copyQuad->vPlane().size);
     EXPECT_EQ(vPlane.format, copyQuad->vPlane().format);
 }
 
 }  // namespace
 }  // namespace cc