Always restore GL scissor box in GLRenderer::RestoreGLState()

cc/output/gl_renderer_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/output/gl_renderer.h"
 
 #include <stdint.h>
 
 #include <set>
 #include <vector>
@@ skipping 1890 matching lines @@
                         gfx::Rect(viewport_size), gfx::Transform());
       AddQuad(root_pass, gfx::Rect(viewport_size), SK_ColorGREEN);
 
       testing::Sequence seq;
       // A bunch of initialization that happens.
       EXPECT_CALL(*gl, Disable(GL_DEPTH_TEST)).InSequence(seq);
       EXPECT_CALL(*gl, Disable(GL_CULL_FACE)).InSequence(seq);
       EXPECT_CALL(*gl, Disable(GL_STENCIL_TEST)).InSequence(seq);
       EXPECT_CALL(*gl, Enable(GL_BLEND)).InSequence(seq);
       EXPECT_CALL(*gl, Disable(GL_SCISSOR_TEST)).InSequence(seq);
+      EXPECT_CALL(*gl, Scissor(0, 0, 0, 0)).InSequence(seq);
 
       // Partial frame, we should use a scissor to swap only that part when
       // partial swap is enabled.
       root_pass->damage_rect = gfx::Rect(2, 2, 3, 3);
 
       if (partial_swap) {
         EXPECT_CALL(*gl, Enable(GL_SCISSOR_TEST)).InSequence(seq);
         // The scissor is flipped, so subtract the y coord and height from the
         // bottom of the GL viewport.
         EXPECT_CALL(*gl, Scissor(2, viewport_size.height() - 3 - 2, 3, 3))
@@ skipping 60 matching lines @@
   renderer_->SetVisible(true);
   Mock::VerifyAndClearExpectations(context_support_ptr_);
 
   EXPECT_CALL(*context_support_ptr_, SetAggressivelyFreeResources(true));
   renderer_->SetVisible(false);
   Mock::VerifyAndClearExpectations(context_support_ptr_);
 }
 
 }  // namespace
 }  // namespace cc