Revert of Remove DCHECK_IMPLIES/CHECK_IMPLIES.

content/common/gpu/client/gl_helper_scaling.cc

 // Copyright (c) 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 "content/common/gpu/client/gl_helper_scaling.h"
 
 #include <deque>
 #include <string>
 #include <vector>
 
@@ skipping 852 matching lines @@
   texture_location_ = gl_->GetUniformLocation(program_, "s_texture");
   src_subrect_location_ = gl_->GetUniformLocation(program_, "src_subrect");
   src_pixelsize_location_ = gl_->GetUniformLocation(program_, "src_pixelsize");
   dst_pixelsize_location_ = gl_->GetUniformLocation(program_, "dst_pixelsize");
   scaling_vector_location_ =
       gl_->GetUniformLocation(program_, "scaling_vector");
   color_weights_location_ = gl_->GetUniformLocation(program_, "color_weights");
   // The only reason fetching these attribute locations should fail is
   // if the context was spontaneously lost (i.e., because the GPU
   // process crashed, perhaps deliberately for testing).
-  DCHECK(Initialized() || gl_->GetGraphicsResetStatusKHR() != GL_NO_ERROR);
+  DCHECK_IMPLIES(!Initialized(),
+                 gl_->GetGraphicsResetStatusKHR() != GL_NO_ERROR);
 }
 
 void ShaderProgram::UseProgram(const gfx::Size& src_size,
                                const gfx::Rect& src_subrect,
                                const gfx::Size& dst_size,
                                bool scale_x,
                                bool flip_y,
                                GLfloat color_weights[4]) {
   gl_->UseProgram(program_);
 
@@ skipping 38 matching lines @@
   gl_->Uniform2f(dst_pixelsize_location_,
                  static_cast<float>(dst_size.width()),
                  static_cast<float>(dst_size.height()));
 
   gl_->Uniform2f(
       scaling_vector_location_, scale_x ? 1.0 : 0.0, scale_x ? 0.0 : 1.0);
   gl_->Uniform4fv(color_weights_location_, 1, color_weights);
 }
 
 }  // namespace content