Fix a bug in TextInputManager::GetCompositionRangeInfo

content/browser/renderer_host/text_input_manager.h

 // Copyright 2016 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_TEXT_INPUT_MANAGER_H__
 #define CONTENT_BROWSER_RENDERER_HOST_TEXT_INPUT_MANAGER_H__
 
 #include <unordered_map>
 #include <utility>
 
@@ skipping 139 matching lines @@
   // ui::TEXT_INPUT_TYPE_NONE.
   const TextInputState* GetTextInputState() const;
 
   // Returns the selection bounds information for |view|. If |view| == nullptr,
   // it will return the corresponding information for |active_view_| or nullptr
   // if there are no active views.
   const SelectionRegion* GetSelectionRegion(
       RenderWidgetHostViewBase* view = nullptr) const;
 
   // Returns the composition range and character bounds information for the
-  // |view|. If |view| == nullptr, it will assume |active_view_| and return its
-  // state. If |active_view_| == nullptr, this method will return nullptr.
-  const TextInputManager::CompositionRangeInfo* GetCompositionRangeInfo(
-      RenderWidgetHostViewBase* view = nullptr) const;
+  // |active_view_|. Returns nullptr If |active_view_| == nullptr.
+  const TextInputManager::CompositionRangeInfo* GetCompositionRangeInfo() const;
 
   // The following method returns the text selection state for the given |view|.
   // If |view| == nullptr, it will assume |active_view_| and return its state.
   // In the case of |active_view_| == nullptr, the method will return nullptr.
   const TextSelection* GetTextSelection(
       RenderWidgetHostViewBase* view = nullptr) const;
 
   // ---------------------------------------------------------------------------
   // The following methods are called by RWHVs on the tab to update their IME-
   // related state.
@@ skipping 76 matching lines @@
   ViewMap<CompositionRangeInfo> composition_range_info_map_;
   ViewMap<TextSelection> text_selection_map_;
 
   base::ObserverList<Observer> observer_list_;
 
   DISALLOW_COPY_AND_ASSIGN(TextInputManager);
 };
 }
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_TEXT_INPUT_MANAGER_H__