Upstream Chrome on iOS source code [4/11].

ios/chrome/browser/ui/contextual_search/js_contextual_search_manager.h

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef IOS_CHROME_BROWSER_UI_CONTEXTUAL_SEARCH_JS_CONTEXTUAL_SEARCH_MANAGER_H_
+#define IOS_CHROME_BROWSER_UI_CONTEXTUAL_SEARCH_JS_CONTEXTUAL_SEARCH_MANAGER_H_
+
+#import <UIKit/UIKit.h>
+
+#import "ios/web/public/web_state/js/crw_js_injection_manager.h"
+
+#include "base/ios/block_types.h"
+
+// JsContextualSearchManager manages the scripts related to contextual search.
+@interface JsContextualSearchManager : CRWJSInjectionManager
+
+// Asynchronously fetches the search context for |point| in the web view.
+// |handler| is called back with the JSON-encoded search context, or an
+// empty dictionary if no search context was found at |point|
+- (void)fetchContextFromSelectionAtPoint:(CGPoint)point
+                       completionHandler:(void (^)(NSString*))handler;
+
+// Sets the JavaScript events listeners on selection change and DOM mutation.
+// |mutationDelay| is the timeout of the DOM mutation events.
+// |bodyTouchDelay| is the timeout of the body touch events.
+- (void)enableEventListenersWithMutationDelay:(CGFloat)mutationDelay
+                               bodyTouchDelay:(CGFloat)bodyTouchDelay;
+
+// Disables the JavaScript events listeners on selection change and DOM
+// mutation.
+- (void)disableListeners;
+
+// Expands the highlight zone to the specified range.
+- (void)expandHighlightToStartOffset:(int)startOffset
+                           endOffset:(int)endOffset
+                   completionHandler:(web::JavaScriptResultBlock)completion;
+
+// Retrieve the position of the highlight in the web view.
+- (void)highlightRectsWithCompletionHandler:
+    (web::JavaScriptResultBlock)completion;
+
+// Clears the highlight info.
+- (void)clearHighlight;
+
+@end
+
+#endif  // IOS_CHROME_BROWSER_UI_CONTEXTUAL_SEARCH_JS_CONTEXTUAL_SEARCH_MANAGER_H_