Remove DirectRenderer::disableScissorTest, always leave GL_SCISSOR_TEST enabled in GlRenderer

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 "cc/debug_border_draw_quad.h"
 #include "cc/render_pass_draw_quad.h"
@@ skipping 125 matching lines @@
     setDrawViewportSize(framebufferRect.size());
 
     return true;
 }
 
 void SoftwareRenderer::enableScissorTestRect(const gfx::Rect& scissorRect)
 {
     m_skCurrentCanvas->clipRect(toSkRect(scissorRect), SkRegion::kReplace_Op);
 }
 
-void SoftwareRenderer::disableScissorTest()
-{
-    gfx::Rect canvasRect(gfx::Point(), viewportSize());
-    m_skCurrentCanvas->clipRect(toSkRect(canvasRect), SkRegion::kReplace_Op);
-}
-
 void SoftwareRenderer::clearFramebuffer(DrawingFrame& frame)
 {
     if (frame.currentRenderPass->hasTransparentBackground()) {
         m_skCurrentCanvas->clear(SkColorSetARGB(0, 0, 0, 0));
     } else {
 #ifndef NDEBUG
         // On DEBUG builds, opaque render passes are cleared to blue to easily see regions that were not drawn on the screen.
         m_skCurrentCanvas->clear(SkColorSetARGB(255, 0, 0, 255));
 #endif
     }
@@ skipping 202 matching lines @@
 }
 
 void SoftwareRenderer::setVisible(bool visible)
 {
     if (m_visible == visible)
         return;
     m_visible = visible;
 }
 
 }  // namespace cc