Update query in omnibox search icon.

Uses an updated asset for the query in omnibox magnifying glass to match
the size of the security icon.

Bug:836043

Change-Id: Ia84817af01373fbcfc3f07656ce0ee77a0f553e0
Reviewed-on: https://chromium-review.googlesource.com/1040534
Commit-Queue: Troy Hildebrandt <thildebr@chromium.org>
Reviewed-by: David Trainor <dtrainor@chromium.org>
Reviewed-by: Maria Khomenko <mariakhomenko@chromium.org>
Cr-Commit-Position: refs/heads/master@{#556583}

chrome/android/java/src/org/chromium/chrome/browser/toolbar/ToolbarModel.java

@@ -337,7 +337,7 @@ public class ToolbarModel implements ToolbarDataProvider {
         // If we're showing a query in the omnibox, and the security level is high enough to show
         // the search icon, return that instead of the security icon.
         if (shouldDisplaySearchTerms()) {
-            return R.drawable.ic_search;
+            return R.drawable.omnibox_search;
         }
         return getSecurityIconResource(getSecurityLevel(), !isTablet, isOfflinePage());
     }

chrome/android/javatests/src/org/chromium/chrome/browser/omnibox/LocationBarLayoutTest.java

@@ -52,7 +52,7 @@ public class LocationBarLayoutTest {
     @Rule
     public TestRule mProcessor = new Features.InstrumentationProcessor();
 
-    private static final int SEARCH_ICON_RESOURCE = R.drawable.ic_search;
+    private static final int SEARCH_ICON_RESOURCE = R.drawable.omnibox_search;
 
     private static final String SEARCH_TERMS = "machine learning";
     private static final String GOOGLE_SRP_URL = "https://www.google.com/search?q=machine+learning";