[ContextualSearch] Adds long press promo for Contextual Search.

chrome/android/javatests/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchEventFilterTest.java

Index: chrome/android/javatests/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchEventFilterTest.java
diff --git a/chrome/android/javatests/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchEventFilterTest.java b/chrome/android/javatests/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchEventFilterTest.java
index b7cec329bd6ed8d6d4be9c633924cf52cd6a7861..80b563927ca211496203ce0564f9685447577cda 100644
--- a/chrome/android/javatests/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchEventFilterTest.java
+++ b/chrome/android/javatests/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchEventFilterTest.java
@@ -126,7 +126,7 @@ public class ContextualSearchEventFilterTest extends InstrumentationTestCase
     // --------------------------------------------------------------------------------------------
 
     /**
-     * MockContextualSearchPanel stops creation of ContentViewCores.
+     * Mocks the ContextualSearchPanel, so it doesn't create ContentViewCore.
      */
     public static class MockContextualSearchPanel extends ContextualSearchPanel {
 
@@ -154,6 +154,12 @@ public class ContextualSearchEventFilterTest extends InstrumentationTestCase
             @Override
             public void removeLastHistoryEntry(String url, long timeInMs) {}
         }
+
+        @Override
+        protected float getPeekPromoHeight() {
+            // Android Views are not used in this test so we cannot get the actual height.
+            return 0.f;
+        }
     }
 
     // --------------------------------------------------------------------------------------------