Add more options to --screen-config flag.

ui/display/test/display_matchers.cc

Index: ui/display/test/display_matchers.cc
diff --git a/ui/display/test/display_matchers.cc b/ui/display/test/display_matchers.cc
new file mode 100644
index 0000000000000000000000000000000000000000..9668986491481050a49f0c22567f2095840998c1
--- /dev/null
+++ b/ui/display/test/display_matchers.cc
@@ -0,0 +1,48 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "ui/display/test/display_matchers.h"
+
+namespace display {
+
+namespace {
+
+const float kEpsilon = 0.0001f;
+
+// Matcher to check DisplayMode size and refresh rate.
+class DisplayModeMatcher
+    : public testing::MatcherInterface<const ui::DisplayMode&> {
+ public:
+  DisplayModeMatcher(int width, int height, float refresh_rate)
+      : size_(width, height), refresh_rate_(refresh_rate) {}
+
+  bool MatchAndExplain(const ui::DisplayMode& mode,
+                       testing::MatchResultListener* listener) const override {
+    return mode.size() == size_ &&
+           std::fabs(mode.refresh_rate() - refresh_rate_) < kEpsilon;
+  }
+
+  void DescribeTo(std::ostream* os) const override {
+    *os << "[" << size_.ToString() << " rate=" << refresh_rate_ << "]";
+  }
+
+  void DescribeNegationTo(std::ostream* os) const override {
+    *os << "not [" << size_.ToString() << " rate=" << refresh_rate_ << "]";
+  }
+
+ private:
+  gfx::Size size_;
+  float refresh_rate_;
+};
+
+}  // namespace
+
+testing::Matcher<const ui::DisplayMode&> IsDisplayMode(int width,
+                                                       int height,
+                                                       float refresh_rate) {
+  return testing::MakeMatcher(
+      new DisplayModeMatcher(width, height, refresh_rate));
+}
+
+}  // namespace display