Add UMA to count the number of Google CAPTCHA pages shown and solved by users.

components/page_load_metrics/browser/metrics_web_contents_observer_unittest.cc

 // Copyright (c) 2015 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/page_load_metrics/browser/metrics_web_contents_observer.h"
 
 #include "base/memory/scoped_ptr.h"
 #include "base/process/kill.h"
 #include "base/test/histogram_tester.h"
+#include "base/test/user_action_tester.h"
 #include "base/time/time.h"
 #include "components/page_load_metrics/common/page_load_metrics_messages.h"
 #include "components/rappor/rappor_utils.h"
 #include "components/rappor/test_rappor_service.h"
+#include "content/public/browser/navigation_entry.h"
 #include "content/public/browser/navigation_handle.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/test/test_renderer_host.h"
 #include "content/public/test/web_contents_tester.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace page_load_metrics {
 
 namespace {
 
@@ skipping 66 matching lines @@
     histogram_tester_.ExpectTotalCount(kCommittedEvents, num_committed_events_);
     histogram_tester_.ExpectTotalCount(kBGProvisionalEvents,
                                        num_provisional_events_bg_);
     histogram_tester_.ExpectTotalCount(kBGCommittedEvents,
                                        num_committed_events_bg_);
     histogram_tester_.ExpectTotalCount(kErrorEvents, num_errors_);
   }
 
  protected:
   base::HistogramTester histogram_tester_;
+  base::UserActionTester user_action_tester_;
   rappor::TestRapporService rappor_tester_;
   scoped_ptr<MetricsWebContentsObserver> observer_;
 
  private:
   int num_provisional_events_;
   int num_provisional_events_bg_;
   int num_committed_events_;
   int num_committed_events_bg_;
   int num_errors_;
 
@@ skipping 559 matching lines @@
   const auto& string_it = sample_obj->string_fields.find("Domain");
   EXPECT_NE(string_it, sample_obj->string_fields.end());
   EXPECT_EQ(rappor::GetDomainAndRegistrySampleFromGURL(GURL(kDefaultTestUrl)),
             string_it->second);
 
   const auto& flag_it = sample_obj->flag_fields.find("IsSlow");
   EXPECT_NE(flag_it, sample_obj->flag_fields.end());
   EXPECT_EQ(0u, flag_it->second);
 }
 
+TEST_F(MetricsWebContentsObserverTest, IsGoogleCaptcha) {
+  struct {
+    std::string url;
+    bool expected;
+  } test_cases[] = {
+      {"", false},
+      {"http://www.google.com/", false},
+      {"http://www.cnn.com/", false},
+      {"http://ipv4.google.com/", false},
+      {"https://ipv4.google.com/sorry/IndexRedirect?continue=http://a", true},
+      {"https://ipv6.google.com/sorry/IndexRedirect?continue=http://a", true},
+      {"https://ipv7.google.com/sorry/IndexRedirect?continue=http://a", false},
+  };
+  for (const auto& test : test_cases) {
+    EXPECT_EQ(test.expected, IsGoogleCaptcha(GURL(test.url)))
+        << "for URL: " << test.url;
+  }
+}
+
 }  // namespace page_load_metrics