Make gfx::Rect class operations consistently mutate the class they are called on.

cc/software_renderer.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 "config.h"
 
 #include "cc/software_renderer.h"
 
 #include "CCDebugBorderDrawQuad.h"
 #include "cc/render_pass_draw_quad.h"
@@ skipping 237 matching lines @@
 
 void SoftwareRenderer::drawTextureQuad(const DrawingFrame& frame, const TextureDrawQuad* quad)
 {
     if (!isSoftwareResource(quad->resourceId())) {
         drawUnsupportedQuad(frame, quad);
         return;
     }
 
     // FIXME: Add support for non-premultiplied alpha.
     ResourceProvider::ScopedReadLockSoftware quadResourceLock(m_resourceProvider, quad->resourceId());
-    gfx::RectF uvRect = quad->uvRect().Scale(quad->quadRect().width(), quad->quadRect().height());
+    gfx::RectF uvRect = quad->uvRect();
+    uvRect.Scale(quad->quadRect().width(), quad->quadRect().height());
     SkIRect skUvRect = toSkIRect(gfx::ToEnclosingRect(uvRect));
     if (quad->flipped())
         m_skCurrentCanvas->scale(1, -1);
     m_skCurrentCanvas->drawBitmapRect(*quadResourceLock.skBitmap(), &skUvRect, toSkRect(quadVertexRect()), &m_skCurrentPaint);
 }
 
 void SoftwareRenderer::drawTileQuad(const DrawingFrame& frame, const TileDrawQuad* quad)
 {
     DCHECK(isSoftwareResource(quad->resourceId()));
     ResourceProvider::ScopedReadLockSoftware quadResourceLock(m_resourceProvider, quad->resourceId());
@@ skipping 79 matching lines @@
 }
 
 void SoftwareRenderer::setVisible(bool visible)
 {
     if (m_visible == visible)
         return;
     m_visible = visible;
 }
 
 }