Support setting mouse cursor icon in Android N.

ui/base/BUILD.gn

Index: ui/base/BUILD.gn
diff --git a/ui/base/BUILD.gn b/ui/base/BUILD.gn
index 05cb33baac5cd928c06cdca8923e9ea1fe4718ca..c078ea731e69c958d264dcf023149c3e0ec56e4f 100644
--- a/ui/base/BUILD.gn
+++ b/ui/base/BUILD.gn
@@ -336,8 +336,6 @@ component("base") {
       "clipboard/scoped_clipboard_writer.h",
       "cursor/cursor_util.cc",
       "cursor/cursor_util.h",
-      "cursor/cursors_aura.cc",
-      "cursor/cursors_aura.h",
       "cursor/image_cursors.cc",
       "cursor/image_cursors.h",
       "default_theme_provider.cc",
@@ -356,6 +354,13 @@ component("base") {
       "text/bytes_formatting.cc",
       "text/bytes_formatting.h",
     ]
+
+    if (use_aura) {
+      sources += [
+        "cursor/cursors_aura.cc",
+        "cursor/cursors_aura.h",
+      ]
+    }
   }
 
   if (is_win) {
@@ -614,6 +619,11 @@ component("base") {
       "touch/touch_editing_controller.cc",
       "ui_base_types.cc",
     ]
+    sources += [
+      "cursor/cursors_android.cc",
+      "cursor/cursors_android.h",
+    ]
+    deps += [ "//third_party/WebKit/public:blink_cursor_headers" ]
   }
 
   # Aura clipboard.