Fix crash in DoBlitFramebufferCHROMIUM

gpu/command_buffer/service/gles2_cmd_decoder_unittest_framebuffers.cc

 // Copyright 2014 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 "gpu/command_buffer/service/gles2_cmd_decoder.h"
 
 #include <limits.h>
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 3607 matching lines @@
   EXPECT_EQ(error::kNoError, ExecuteImmediateCmd(cmd, sizeof(attachments)));
   EXPECT_EQ(GL_NO_ERROR, GetGLError());
   // Invalidating DEPTH_STENCIL attachment should make framebuffer uncleared.
   EXPECT_FALSE(framebuffer->IsCleared());
   EXPECT_TRUE(framebuffer->HasUnclearedAttachment(GL_DEPTH_ATTACHMENT));
   EXPECT_TRUE(framebuffer->HasUnclearedAttachment(GL_STENCIL_ATTACHMENT));
   EXPECT_TRUE(framebuffer->HasUnclearedAttachment(
       GL_DEPTH_STENCIL_ATTACHMENT));
 }
 
+TEST_P(GLES3DecoderTest, BlitFramebufferFeedbackLoopDefaultFramebuffer) {
+  // Run BlitFramebufferCHROMIUM targetting the default framebuffer for both
+  // read and draw, should result in a feedback loop.
+  BlitFramebufferCHROMIUM cmd;
+  cmd.Init(0, 0, 1, 1, 0, 0, 1, 1, GL_COLOR_BUFFER_BIT, GL_LINEAR);
+  EXPECT_EQ(error::kNoError, ExecuteCmd(cmd));
+  EXPECT_EQ(GL_INVALID_OPERATION, GetGLError());
+
+  cmd.Init(0, 0, 1, 1, 0, 0, 1, 1, GL_DEPTH_BUFFER_BIT, GL_LINEAR);
+  EXPECT_EQ(error::kNoError, ExecuteCmd(cmd));
+  EXPECT_EQ(GL_INVALID_OPERATION, GetGLError());
+
+  cmd.Init(0, 0, 1, 1, 0, 0, 1, 1, GL_STENCIL_BUFFER_BIT, GL_LINEAR);
+  EXPECT_EQ(error::kNoError, ExecuteCmd(cmd));
+  EXPECT_EQ(GL_INVALID_OPERATION, GetGLError());
+}
+
 // TODO(gman): PixelStorei
 
 // TODO(gman): SwapBuffers
 
 }  // namespace gles2
 }  // namespace gpu