Build fixes for GN mac build.

TBR=jamesr

Review URL: https://codereview.chromium.org/538633003

Cr-Commit-Position: refs/heads/master@{#293312}

content/browser/BUILD.gn

@@ -256,7 +256,6 @@ source_set("browser") {
   } else {
     sources -= [
       "power_save_blocker_x11.cc",
-      "renderer_host/web_input_event_aurax11.cc",
     ]
   }
 

ui/views/BUILD.gn

@@ -245,7 +245,7 @@ if (is_mac) {
       "//ui/compositor",
       "//ui/resources",
       "//ui/resources:ui_test_pak",
-      "//ui/string",
+      "//ui/strings",
       "//ui/wm",
     ]
   }