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

Index: components/page_load_metrics/browser/metrics_web_contents_observer_unittest.cc
diff --git a/components/page_load_metrics/browser/metrics_web_contents_observer_unittest.cc b/components/page_load_metrics/browser/metrics_web_contents_observer_unittest.cc
index de5431f8f1e43b2c86523cc5b6def588104a4667..5d37199ae52a3a3213f288dfa9bd8fe1227b8419 100644
--- a/components/page_load_metrics/browser/metrics_web_contents_observer_unittest.cc
+++ b/components/page_load_metrics/browser/metrics_web_contents_observer_unittest.cc
@@ -7,10 +7,12 @@
 #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"
@@ -97,6 +99,7 @@ class MetricsWebContentsObserverTest
 
  protected:
   base::HistogramTester histogram_tester_;
+  base::UserActionTester user_action_tester_;
   rappor::TestRapporService rappor_tester_;
   scoped_ptr<MetricsWebContentsObserver> observer_;
 
@@ -676,4 +679,28 @@ TEST_F(MetricsWebContentsObserverTest, RapporQuickPageLoad) {
   EXPECT_EQ(0u, flag_it->second);
 }
 
+TEST_F(MetricsWebContentsObserverTest, IsGoogleCaptcha) {
+  {

[Alexei Svitkine (slow), 2015/11/13 17:45:12]

Nit: Can you make this a table driven test?

[Matt Welsh, 2015/11/13 19:37:16]

Done.

+    EXPECT_FALSE(IsGoogleCaptcha(GURL()));
+  }
+  {
+    EXPECT_FALSE(IsGoogleCaptcha(GURL("http://www.cnn.com/")));
+  }
+  {
+    EXPECT_FALSE(IsGoogleCaptcha(GURL("http://ipv4.google.com/")));
+  }
+  {
+    EXPECT_TRUE(IsGoogleCaptcha(
+        GURL("https://ipv4.google.com/sorry/IndexRedirect?continue=http://a")));
+  }
+  {
+    EXPECT_TRUE(IsGoogleCaptcha(
+        GURL("https://ipv6.google.com/sorry/IndexRedirect?continue=http://a")));
+  }
+  {
+    EXPECT_FALSE(IsGoogleCaptcha(
+        GURL("https://ipv7.google.com/sorry/IndexRedirect?continue=http://a")));
+  }
+}
+
 }  // namespace page_load_metrics