Add UMA metrics for Android Chrome Google Search.

chrome/browser/google/google_search_counter.h

Index: chrome/browser/google/google_search_counter.h
diff --git a/chrome/browser/google/google_search_counter.h b/chrome/browser/google/google_search_counter.h
index be60c6a891a9b0a98e3f284880c9e49066e578fa..22751bd85aebf978fd1971cc804e888f358f2526 100644
--- a/chrome/browser/google/google_search_counter.h
+++ b/chrome/browser/google/google_search_counter.h
@@ -10,6 +10,10 @@
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 
+namespace content {
+class NavigationEntry;
+}
+
 // A listener for counting Google searches from various search access points. No
 // actual search query content is observed. See GoogleSearchMetrics for more
 // details about these access points.
@@ -21,6 +25,21 @@ class GoogleSearchCounter : content::NotificationObserver {
   // Return the singleton instance of GoogleSearchCounter.
   static GoogleSearchCounter* GetInstance();
 
+  // Returns the Google search access point for the given |entry|. This method
+  // assumes that we have already verified that |entry|'s URL is a Google search
+  // URL.
+  GoogleSearchMetrics::AccessPoint GetGoogleSearchAccessPointForSearchNavEntry(
+      const content::NavigationEntry& entry) const;
+
+  // Returns true if |details| is valid and corresponds to a search results
+  // page.
+  bool ShouldRecordCommittedDetails(
+      const content::NotificationDetails& details) const;
+
+  const GoogleSearchMetrics* search_metrics() const {
+    return search_metrics_.get();
+  }
+
  private:
   friend struct DefaultSingletonTraits<GoogleSearchCounter>;
   friend class GoogleSearchCounterTest;