Route IME-related IPCs to the active/focused RenderWidget (Mac)

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 <stddef.h>
@@ skipping 458 matching lines @@
       base::TimeTicks* timebase, base::TimeDelta* interval) const override;
   void AcceleratedWidgetSwapCompleted() override;
 
   // Exposed for testing.
   cc::SurfaceId SurfaceIdForTesting() const override;
 
   // Helper method to obtain ui::TextInputType for the active widget from the
   // TextInputManager.
   ui::TextInputType GetTextInputType();
 
+  // Helper method to obtain the currently active widget from TextInputManager.
+  // An active widget is a RenderWidget which is currently focused and has a
+  // |TextInputState.type| which is not ui::TEXT_INPUT_TYPE_NONE.
+  RenderWidgetHostImpl* GetActiveWidget();
+
  private:
   friend class RenderWidgetHostViewMacTest;
 
   // Returns whether this render view is a popup (autocomplete window).
   bool IsPopup() const;
 
   // Shuts down the render_widget_host_.  This is a separate function so we can
   // invoke it from the message loop.
   void ShutdownHost();
 
@@ skipping 59 matching lines @@
 
   // 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_