Change overscroll functions to pass floats.

chrome/browser/ui/browser.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 CHROME_BROWSER_UI_BROWSER_H_
 #define CHROME_BROWSER_UI_BROWSER_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 423 matching lines @@
   // Overridden from content::WebContentsDelegate:
   virtual bool CanOverscrollContent() const override;
   virtual bool ShouldPreserveAbortedURLs(content::WebContents* source) override;
   virtual bool PreHandleKeyboardEvent(
       content::WebContents* source,
       const content::NativeWebKeyboardEvent& event,
       bool* is_keyboard_shortcut) override;
   virtual void HandleKeyboardEvent(
       content::WebContents* source,
       const content::NativeWebKeyboardEvent& event) override;
-  virtual void OverscrollUpdate(int delta_y) override;
+  virtual void OverscrollUpdate(float delta_y) override;
   virtual void ShowValidationMessage(content::WebContents* web_contents,
                                      const gfx::Rect& anchor_in_root_view,
                                      const base::string16& main_text,
                                      const base::string16& sub_text) override;
   virtual void HideValidationMessage(
       content::WebContents* web_contents) override;
   virtual void MoveValidationMessage(
       content::WebContents* web_contents,
       const gfx::Rect& anchor_in_root_view) override;
   virtual bool PreHandleGestureEvent(
@@ skipping 524 matching lines @@
   // The following factory is used for chrome update coalescing.
   base::WeakPtrFactory<Browser> chrome_updater_factory_;
 
   // The following factory is used to close the frame at a later time.
   base::WeakPtrFactory<Browser> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(Browser);
 };
 
 #endif  // CHROME_BROWSER_UI_BROWSER_H_