Remove "Search by Image" feature on Chrome for Android.

chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java

Index: chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java b/chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java
index d4191f4d3233978c1cbcc2ac4e8b5b597fea5f14..28614841b35e0c93c5797e61a03db97fc6dc6167 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java
@@ -484,11 +484,6 @@ public class Tab implements ViewGroup.OnHierarchyChangeListener,
             mActivity.getTabModelSelector().openNewTab(loadUrlParams,
                     TabLaunchType.FROM_LONGPRESS_BACKGROUND, Tab.this, isIncognito());
         }
-
-        @Override
-        public void onSearchByImageInNewTab() {
-            triggerSearchByImage();
-        }
     }
 
     private class TabContentViewClient extends ContentViewClient {
@@ -2687,13 +2682,6 @@ public class Tab implements ViewGroup.OnHierarchyChangeListener,
     }
 
     /**
-     * Triggers native search by image method.
-     */
-    public void triggerSearchByImage() {
-        if (mNativeTabAndroid != 0) nativeSearchByImageInNewTabAsync(mNativeTabAndroid);
-    }
-
-    /**
      * @return The ID of the bookmark associated with the current URL (or -1 if no such bookmark
      *         exists).
      */
@@ -3056,7 +3044,6 @@ public class Tab implements ViewGroup.OnHierarchyChangeListener,
     private native void nativeUpdateTopControlsState(
             long nativeTabAndroid, int constraints, int current, boolean animate);
     private native void nativeLoadOriginalImage(long nativeTabAndroid);
-    private native void nativeSearchByImageInNewTabAsync(long nativeTabAndroid);
     private native long nativeGetBookmarkId(long nativeTabAndroid, boolean onlyEditable);
     private native boolean nativeHasOfflineCopy(long nativeTabAndroid);
     private native boolean nativeIsOfflinePage(long nativeTabAndroid);