Convert CHECK(false) to LOG(FATAL) in ash

Otherwise the log string isn't captured in the logs.

Bug: none
Change-Id: Iaec642686a29cce13a54b35186e7fd8aafd82854
Reviewed-on: https://chromium-review.googlesource.com/c/1464937
Commit-Queue: James Cook <jamescook@chromium.org>
Commit-Queue: Xiyuan Xia <xiyuan@chromium.org>
Auto-Submit: James Cook <jamescook@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#630960}
diff --git a/chrome/browser/chromeos/login/screenshot_testing/screenshot_tester.cc b/chrome/browser/chromeos/login/screenshot_testing/screenshot_tester.cc
index 7648581..ddeb028 100644
--- a/chrome/browser/chromeos/login/screenshot_testing/screenshot_tester.cc
+++ b/chrome/browser/chromeos/login/screenshot_testing/screenshot_tester.cc
@@ -231,7 +231,7 @@
   base::GetFileSize(image_path, &golden_screenshot_size);
 
   if (golden_screenshot_size == -1) {
-    CHECK(false) << "Can't get golden screenshot size";
+    LOG(FATAL) << "Can't get golden screenshot size";
   }
   scoped_refptr<base::RefCountedBytes> png_data = new base::RefCountedBytes;
   png_data->data().resize(golden_screenshot_size);
diff --git a/chrome/browser/chromeos/net/network_portal_detector_impl_browsertest.cc b/chrome/browser/chromeos/net/network_portal_detector_impl_browsertest.cc
index 25f4068..89da0274 100644
--- a/chrome/browser/chromeos/net/network_portal_detector_impl_browsertest.cc
+++ b/chrome/browser/chromeos/net/network_portal_detector_impl_browsertest.cc
@@ -58,7 +58,7 @@
 
 void ErrorCallbackFunction(const std::string& error_name,
                            const std::string& error_message) {
-  CHECK(false) << "Shill Error: " << error_name << " : " << error_message;
+  LOG(FATAL) << "Shill Error: " << error_name << " : " << error_message;
 }
 
 void SetConnected(const std::string& service_path) {