DEPS: Update leveldatabase from 1.18 to 1.20.

storage/browser/BUILD.gn

Index: storage/browser/BUILD.gn
diff --git a/storage/browser/BUILD.gn b/storage/browser/BUILD.gn
index d701ae0b049d505f83e479ada8802ebd1a570b83..aac83bfcfd29ab8a40c6519690b761f72dbf2916 100644
--- a/storage/browser/BUILD.gn
+++ b/storage/browser/BUILD.gn
@@ -237,4 +237,9 @@ test("storage_unittests") {
     "//base/test:test_support",
     "//testing/gtest",
   ]
+
+  # Trick for getting leveldb tests compiled on the CQ. http://crbug.com/697788

[Nico, 2017/03/02 14:11:27]

dpranke: ^

[Dirk Pranke, 2017/03/02 16:35:00]

Don't do this, it's making the build incorrect by claiming that there are
dependencies that aren't really there.
In addition, you're trying to subvert policies that were put in place
intentionally.

If you want to ensure that particular targets are built as part of the CQ, there
is an approved way to do that: add them to the `additional_compile_targets`
entries for a given builder in the //testing/buildbot/*.json files.

+  if (!is_android) {
+    deps += [ "//third_party/leveldatabase:leveldb_test_targets" ]
+  }
 }