Use LOG() or LOG_IF() instead of IMMEDIATE_CRASH

third_party/WebKit/Source/platform/graphics/GraphicsLayer.cpp

Index: third_party/WebKit/Source/platform/graphics/GraphicsLayer.cpp
diff --git a/third_party/WebKit/Source/platform/graphics/GraphicsLayer.cpp b/third_party/WebKit/Source/platform/graphics/GraphicsLayer.cpp
index 1f1931d8df4f240a5b98c7b96955be0ab89e6a7f..521ba090cdb9cc9c4eaf02fbe6941b2e3f591e7c 100644
--- a/third_party/WebKit/Source/platform/graphics/GraphicsLayer.cpp
+++ b/third_party/WebKit/Source/platform/graphics/GraphicsLayer.cpp
@@ -387,15 +387,13 @@ static HashSet<int>* g_registered_layer_set;
 void GraphicsLayer::RegisterContentsLayer(WebLayer* layer) {
   if (!g_registered_layer_set)
     g_registered_layer_set = new HashSet<int>;
-  if (g_registered_layer_set->Contains(layer->Id()))
-    IMMEDIATE_CRASH();
+  CHECK(!g_registered_layer_set->Contains(layer->Id()));
   g_registered_layer_set->insert(layer->Id());
 }
 
 void GraphicsLayer::UnregisterContentsLayer(WebLayer* layer) {
   DCHECK(g_registered_layer_set);
-  if (!g_registered_layer_set->Contains(layer->Id()))
-    IMMEDIATE_CRASH();
+  CHECK(g_registered_layer_set->Contains(layer->Id()));
   g_registered_layer_set->erase(layer->Id());
 }
 
@@ -403,8 +401,7 @@ void GraphicsLayer::SetContentsTo(WebLayer* layer) {
   bool children_changed = false;
   if (layer) {
     DCHECK(g_registered_layer_set);
-    if (!g_registered_layer_set->Contains(layer->Id()))
-      IMMEDIATE_CRASH();
+    CHECK(g_registered_layer_set->Contains(layer->Id()));
     if (contents_layer_id_ != layer->Id()) {
       SetupContentsLayer(layer);
       children_changed = true;