Implement "Look Up In Dictionary" context menu item asynchronously.

content/browser/renderer_host/render_widget_host_view_mac.h

 // Copyright (c) 2012 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 CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_MAC_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_MAC_H_
 
 #import <Cocoa/Cocoa.h>
 #include <IOSurface/IOSurface.h>
 #include <list>
@@ skipping 190 matching lines @@
 // Enables or disables plugin IME.
 - (void)setPluginImeActive:(BOOL)active;
 // Updates the current plugin focus state.
 - (void)pluginFocusChanged:(BOOL)focused forPlugin:(int)pluginId;
 // Evaluates the event in the context of plugin IME, if plugin IME is enabled.
 // Returns YES if the event was handled.
 - (BOOL)postProcessEventForPluginIme:(NSEvent*)event;
 - (void)updateCursor:(NSCursor*)cursor;
 - (NSRect)firstViewRectForCharacterRange:(NSRange)theRange
                              actualRange:(NSRangePointer)actualRange;
+- (void) ShowLookUpDictionary:(NSPoint)point;

[Alexei Svitkine (slow), 2015/09/01 16:27:03]

Nit: Use objc naming convention please.

e.g.

- (void)showLookUpDictionaryOverlayAtPoint:(NSPoint)point;

[Shu Chen, 2015/09/02 03:35:42]

Done.

 @end
 
 namespace content {
 
 ///////////////////////////////////////////////////////////////////////////////
 // RenderWidgetHostViewMac
 //
 //  An object representing the "View" of a rendered web page. This object is
 //  responsible for displaying the content of the web page, and integrating with
 //  the Cocoa view system. It is the implementation of the RenderWidgetHostView
@@ skipping 134 matching lines @@
   void ForwardMouseEvent(const blink::WebMouseEvent& event);
 
   void KillSelf();
 
   void SetTextInputActive(bool active);
 
   // Sends completed plugin IME notification and text back to the renderer.
   void PluginImeCompositionCompleted(const base::string16& text, int plugin_id);
 
   const std::string& selected_text() const { return selected_text_; }
+  const gfx::Range& composition_range() const { return composition_range_; }
+  const base::string16& selection_text() const { return selection_text_; }
+  size_t selection_text_offset() const { return selection_text_offset_; }
 
   // Returns true and stores first rectangle for character range if the
   // requested |range| is already cached, otherwise returns false.
   // Exposed for testing.
   CONTENT_EXPORT bool GetCachedFirstRectForCharacterRange(
       NSRange range, NSRect* rect, NSRange* actual_range);
 
   // Returns true if there is line break in |range| and stores line breaking
   // point to |line_breaking_point|. The |line_break_point| is valid only if
   // this function returns true.
@@ skipping 205 matching lines @@
   base::TimeTicks vsync_timebase_;
   base::TimeDelta vsync_interval_;
 
   // The current composition character range and its bounds.
   gfx::Range composition_range_;
   std::vector<gfx::Rect> composition_bounds_;
 
   // The current caret bounds.
   gfx::Rect caret_rect_;
 
+  // The current first selection bounds.
+  gfx::Rect first_selection_rect_;
+
   // Factory used to safely scope delayed calls to ShutdownHost().
   base::WeakPtrFactory<RenderWidgetHostViewMac> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewMac);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_MAC_H_