Don't DCHECK that we didn't lose the GL context

cc/output/gl_renderer.cc

 // Copyright 2010 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 <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 2267 matching lines @@
 
   if (color_conversion_mode == COLOR_CONVERSION_MODE_LUT) {
     ColorLUTCache::LUT lut = color_lut_cache_.GetLUT(quad->video_color_space,
                                                      frame->device_color_space);
     gl_->ActiveTexture(GL_TEXTURE5);
     gl_->BindTexture(GL_TEXTURE_2D, lut.texture);
     gl_->Uniform1i(program->lut_texture_location(), 5);
     gl_->Uniform1f(program->lut_size_location(), lut.size);
     gl_->ActiveTexture(GL_TEXTURE0);
   }
-  DCHECK_NE(program->yuv_and_resource_matrix_location(), -1);
   float yuv_to_rgb_matrix[16] = {0};
   ComputeYUVToRGBMatrices(quad->color_space, quad->bits_per_channel,
                           quad->resource_multiplier, quad->resource_offset,
                           color_conversion_mode, yuv_to_rgb_matrix);
   gl_->UniformMatrix4fv(program->yuv_and_resource_matrix_location(), 1, 0,
                         yuv_to_rgb_matrix);
 
   // The transform and vertex data are used to figure out the extents that the
   // un-antialiased quad should have and which vertex this is and the float
   // quad passed in via uniform is the actual geometry that gets used to draw
@@ skipping 1296 matching lines @@
     return;
 
   // Report GPU overdraw as a percentage of |max_result|.
   TRACE_COUNTER1(
       TRACE_DISABLED_BY_DEFAULT("cc.debug.overdraw"), "GPU Overdraw",
       (std::accumulate(overdraw->begin(), overdraw->end(), 0) * 100) /
           max_result);
 }
 
 }  // namespace cc