Remove DCHECK_IMPLIES and CHECK_IMPLIES

cc/trees/layer_tree_host_impl.cc

Index: cc/trees/layer_tree_host_impl.cc
diff --git a/cc/trees/layer_tree_host_impl.cc b/cc/trees/layer_tree_host_impl.cc
index c4a6373f51e46b0081c1a53b4f794d6ff974de5e..5187d50efa5165fb0d5e85235bd0afb1f203b208 100644
--- a/cc/trees/layer_tree_host_impl.cc
+++ b/cc/trees/layer_tree_host_impl.cc
@@ -242,8 +242,7 @@ LayerTreeHostImpl::LayerTreeHostImpl(
       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());
@@ -980,7 +979,7 @@ DrawResult LayerTreeHostImpl::CalculateRenderPasses(
   // 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;
 }
@@ -2116,11 +2115,10 @@ void LayerTreeHostImpl::CreateResourceAndTileTaskWorkerPool(
 
   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 =