[Contextual Search] Add metrics for Resolve and View timing

chrome/android/java/src/org/chromium/chrome/browser/compositor/bottombar/contextualsearch/ContextualSearchPanel.java

Index: chrome/android/java/src/org/chromium/chrome/browser/compositor/bottombar/contextualsearch/ContextualSearchPanel.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/compositor/bottombar/contextualsearch/ContextualSearchPanel.java b/chrome/android/java/src/org/chromium/chrome/browser/compositor/bottombar/contextualsearch/ContextualSearchPanel.java
index 50796ab6cae0f71c25fc96289dae8ded541f836a..107cfe0ef55a9b44695f795702cdded01dec3346 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/compositor/bottombar/contextualsearch/ContextualSearchPanel.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/compositor/bottombar/contextualsearch/ContextualSearchPanel.java
@@ -383,6 +383,15 @@ public class ContextualSearchPanel extends OverlayPanel {
     }
 
     /**
+     * Notifies the panel that navigation to prefetched Search Results are now viewable.

[Theresa, 2016/02/29 19:42:44]

I was confused about what "navigation" meant until reading the docstrings in
ContextualSearchUma.

Initially I was thinking this should read "Notifies the panel that prefetched
Search Results are now viewable", but it looks like this method isn't notifying
the panel, it's notifying panel metrics. Maybe something like "Called after the
panel has navigated to prefetched Search Results" or something like that.

In the same vein, I think the method name is confusing.
onNavigateToPrefetchedSearch() makes more sense to me or
onPanelNavigatedToPrefetchedSearch()

[Donn Denman, 2016/03/01 21:18:07]

OK, I adopted your suggestions for "onPanelNavigatedToPrefetchedSearch" as the
method name and updated the description as you suggested.

+     * If the user has the panel open then they will see the prefetched result starting to load.
+     * @param didResolve Whether the search required Search Term Resolution.
+     */
+    public void onPrefetchedSearchNavigated(boolean didResolve) {
+        mPanelMetrics.onPrefetchedSearchNavigated(didResolve);
+    }
+
+    /**
      * Maximizes the Contextual Search Panel, then promotes it to a regular Tab.
      * @param reason The {@code StateChangeReason} behind the maximization and promotion to tab.
      */
@@ -470,7 +479,8 @@ public class ContextualSearchPanel extends OverlayPanel {
      * Handles showing the resolved search term in the SearchBar.
      * @param searchTerm The string that represents the search term.
      */
-    public void onSearchTermResolutionResponse(String searchTerm) {
+    public void onSearchTermResolved(String searchTerm) {
+        mPanelMetrics.onSearchTermResolved();
         getSearchBarControl().setSearchTerm(searchTerm);
         animateSearchTermResolution();
     }