Revert of Remove DCHECK_IMPLIES/CHECK_IMPLIES.

ui/gl/gl_fence_egl.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 "ui/gl/gl_fence_egl.h"
 
 #include "ui/gl/egl_util.h"
 #include "ui/gl/gl_bindings.h"
 
 namespace gfx {
@@ skipping 26 matching lines @@
   }
 
   DCHECK(value == EGL_SIGNALED_KHR || value == EGL_UNSIGNALED_KHR);
   return !value || value == EGL_SIGNALED_KHR;
 }
 
 void GLFenceEGL::ClientWait() {
   EGLint flags = 0;
   EGLTimeKHR time = EGL_FOREVER_KHR;
   EGLint result = eglClientWaitSyncKHR(display_, sync_, flags, time);
-  DCHECK(g_ignore_egl_sync_failures || EGL_TIMEOUT_EXPIRED_KHR != result);
+  DCHECK_IMPLIES(!g_ignore_egl_sync_failures,
+                 EGL_TIMEOUT_EXPIRED_KHR != result);
   if (result == EGL_FALSE) {
     LOG(ERROR) << "Failed to wait for EGLSync. error:"
                << ui::GetLastEGLErrorString();
     CHECK(g_ignore_egl_sync_failures);
   }
 }
 
 void GLFenceEGL::ServerWait() {
   if (!gfx::g_driver_egl.ext.b_EGL_KHR_wait_sync) {
     ClientWait();
     return;
   }
   EGLint flags = 0;
   if (eglWaitSyncKHR(display_, sync_, flags) == EGL_FALSE) {
     LOG(ERROR) << "Failed to wait for EGLSync. error:"
                << ui::GetLastEGLErrorString();
     CHECK(g_ignore_egl_sync_failures);
   }
 }
 
 GLFenceEGL::~GLFenceEGL() {
   eglDestroySyncKHR(display_, sync_);
 }
 
 }  // namespace gfx