Remove DCHECK_IMPLIES and CHECK_IMPLIES

cc/trees/layer_tree_host_impl.cc

 // Copyright 2011 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/trees/layer_tree_host_impl.h"
 
 #include <algorithm>
 #include <limits>
 #include <map>
 #include <set>
@@ skipping 224 matching lines @@
       rendering_stats_instrumentation_(rendering_stats_instrumentation),
       micro_benchmark_controller_(this),
       shared_bitmap_manager_(shared_bitmap_manager),
       gpu_memory_buffer_manager_(gpu_memory_buffer_manager),
       task_graph_runner_(task_graph_runner),
       id_(id),
       requires_high_res_to_draw_(false),
       is_likely_to_require_a_draw_(false),
       frame_timing_tracker_(FrameTimingTracker::Create(this)) {
   DCHECK(proxy_->IsImplThread());
-  DCHECK_IMPLIES(settings.use_one_copy, !settings.use_zero_copy);
-  DCHECK_IMPLIES(settings.use_zero_copy, !settings.use_one_copy);
+  DCHECK(!settings.use_one_copy || !settings.use_zero_copy);
   DidVisibilityChange(this, visible_);
   animation_registrar_->set_supports_scroll_animations(
       proxy_->SupportsImplScrolling());
 
   SetDebugState(settings.initial_debug_state);
 
   // LTHI always has an active tree.
   active_tree_ =
       LayerTreeImpl::create(this, new SyncedProperty<ScaleGroup>(),
                             new SyncedTopControls, new SyncedElasticOverscroll);
@@ skipping 716 matching lines @@
                    "draw_result", draw_result, "missing tiles",
                    num_missing_tiles);
 
   // Draw has to be successful to not drop the copy request layer.
   // When we have a copy request for a layer, we need to draw even if there
   // would be animating checkerboards, because failing under those conditions
   // triggers a new main frame, which may cause the copy request layer to be
   // destroyed.
   // TODO(weiliangc): Test copy request w/ output surface recreation. Would
   // trigger this DCHECK.
-  DCHECK_IMPLIES(have_copy_request, draw_result == DRAW_SUCCESS);
+  DCHECK(!have_copy_request || draw_result == DRAW_SUCCESS);
 
   return draw_result;
 }
 
 void LayerTreeHostImpl::MainThreadHasStoppedFlinging() {
   top_controls_manager_->MainThreadHasStoppedFlinging();
   if (input_handler_client_)
     input_handler_client_->MainThreadHasStoppedFlinging();
 }
 
@@ skipping 1115 matching lines @@
 
     *tile_task_worker_pool = GpuTileTaskWorkerPool::Create(
         task_runner, task_graph_runner, context_provider,
         resource_provider_.get(), settings_.use_distance_field_text,
         msaa_sample_count);
     return;
   }
 
   DCHECK(GetRendererCapabilities().using_image);
   unsigned image_target = settings_.use_image_texture_target;
-  DCHECK_IMPLIES(image_target == GL_TEXTURE_RECTANGLE_ARB,
-                 context_provider->ContextCapabilities().gpu.texture_rectangle);
-  DCHECK_IMPLIES(
-      image_target == GL_TEXTURE_EXTERNAL_OES,
-      context_provider->ContextCapabilities().gpu.egl_image_external);
+  DCHECK(image_target != GL_TEXTURE_RECTANGLE_ARB ||
+         context_provider->ContextCapabilities().gpu.texture_rectangle);
+  DCHECK(image_target != GL_TEXTURE_EXTERNAL_OES ||
+         context_provider->ContextCapabilities().gpu.egl_image_external);
 
   if (settings_.use_zero_copy) {
     *resource_pool =
         ResourcePool::Create(resource_provider_.get(), image_target);
 
     *tile_task_worker_pool = ZeroCopyTileTaskWorkerPool::Create(
         task_runner, task_graph_runner, resource_provider_.get());
     return;
   }
 
@@ skipping 1309 matching lines @@
   new_target.SetToMin(layer_impl->MaxScrollOffset());
 
   curve->UpdateTarget(
       animation->TrimTimeToCurrentIteration(CurrentBeginFrameArgs().frame_time)
           .InSecondsF(),
       new_target);
 
   return true;
 }
 }  // namespace cc