Use Titlebar instead of TitleBar consistently in panels code.

chrome/browser/ui/panels/native_panel.h

 // Copyright (c) 2011 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 CHROME_BROWSER_UI_PANELS_NATIVE_PANEL_H_
 #define CHROME_BROWSER_UI_PANELS_NATIVE_PANEL_H_
 #pragma once
 
 #include "chrome/browser/ui/panels/panel.h"
 #include "ui/gfx/native_widget_types.h"
@@ skipping 22 matching lines @@
   virtual ~NativePanel() {}
 
   virtual void ShowPanel() = 0;
   virtual void ShowPanelInactive() = 0;
   virtual gfx::Rect GetPanelBounds() const = 0;
   virtual void SetPanelBounds(const gfx::Rect& bounds) = 0;
 
   // The native panel needs to update the bounds. In addition, it needs to watch
   // for the mouse movement so that it knows when to bring up or down all the
   // minimized panels. To do this, when the mouse moves, the native panel needs
-  // to call PanelManager::ShouldBringUpTitleBarForAllMinimizedPanels to check.
+  // to call PanelManager::ShouldBringUpTitlebarForAllMinimizedPanels to check.
   virtual void OnPanelExpansionStateChanged(
       Panel::ExpansionState expansion_state) = 0;
 
   // When the mouse is at (mouse_x, mouse_y) in screen coordinate system, finds
   // out if the title-bar needs to pop up for the minimized panel that is only
   // shown as 3-pixel lines.
-  virtual bool ShouldBringUpPanelTitleBar(int mouse_x, int mouse_y) const = 0;
+  virtual bool ShouldBringUpPanelTitlebar(int mouse_x, int mouse_y) const = 0;
 
   virtual void ClosePanel() = 0;
   virtual void ActivatePanel() = 0;
   virtual void DeactivatePanel() = 0;
   virtual bool IsPanelActive() const = 0;
   virtual gfx::NativeWindow GetNativePanelHandle() = 0;
   virtual void UpdatePanelTitleBar() = 0;
   virtual void ShowTaskManagerForPanel() = 0;
   virtual FindBar* CreatePanelFindBar() = 0;
   virtual void NotifyPanelOnUserChangedTheme() = 0;
@@ skipping 13 matching lines @@
   virtual ~NativePanelTesting() {}
 
   virtual void PressLeftMouseButtonTitlebar(const gfx::Point& point) = 0;
   virtual void ReleaseMouseButtonTitlebar() = 0;
   virtual void DragTitlebar(int delta_x, int delta_y) = 0;
   virtual void CancelDragTitlebar() = 0;
   virtual void FinishDragTitlebar() = 0;
 };
 
 #endif  // CHROME_BROWSER_UI_PANELS_NATIVE_PANEL_H_