Revert of Remove MockConstraints

components/test_runner/mock_constraints.cc

Index: components/test_runner/mock_constraints.cc
diff --git a/components/test_runner/mock_constraints.cc b/components/test_runner/mock_constraints.cc
new file mode 100644
index 0000000000000000000000000000000000000000..7e18e55ecdfc1b4fc3f68988167ad24c5b2e00af
--- /dev/null
+++ b/components/test_runner/mock_constraints.cc
@@ -0,0 +1,64 @@
+// Copyright 2013 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 "components/test_runner/mock_constraints.h"
+
+#include <stddef.h>
+
+#include "third_party/WebKit/public/platform/WebMediaConstraints.h"
+#include "third_party/WebKit/public/platform/WebString.h"
+
+using blink::WebMediaConstraint;
+using blink::WebMediaConstraints;
+using blink::WebString;
+using blink::WebVector;
+
+namespace test_runner {
+
+namespace {
+
+bool IsSupported(const WebString& constraint) {
+  return constraint == "valid_and_supported_1" ||
+         constraint == "valid_and_supported_2";
+}
+
+bool IsValid(const WebString& constraint) {
+  return IsSupported(constraint) || constraint == "valid_but_unsupported_1" ||
+         constraint == "valid_but_unsupported_2";
+}
+
+}  // namespace
+
+bool MockConstraints::VerifyConstraints(const WebMediaConstraints& constraints,
+                                        WebString* failed_constraint) {
+  WebVector<WebMediaConstraint> mandatory_constraints;
+  constraints.getMandatoryConstraints(mandatory_constraints);
+  if (mandatory_constraints.size()) {
+    for (size_t i = 0; i < mandatory_constraints.size(); ++i) {
+      const WebMediaConstraint& curr = mandatory_constraints[i];
+      if (!IsSupported(curr.m_name) || curr.m_value != "1") {
+        if (failed_constraint)
+          *failed_constraint = curr.m_name;
+        return false;
+      }
+    }
+  }
+
+  WebVector<WebMediaConstraint> optional_constraints;
+  constraints.getOptionalConstraints(optional_constraints);
+  if (optional_constraints.size()) {
+    for (size_t i = 0; i < optional_constraints.size(); ++i) {
+      const WebMediaConstraint& curr = optional_constraints[i];
+      if (!IsValid(curr.m_name) || curr.m_value != "0") {
+        if (failed_constraint)
+          *failed_constraint = curr.m_name;
+        return false;
+      }
+    }
+  }
+
+  return true;
+}
+
+}  // namespace test_runner