On a middle click, check if the mouse is over a scrollbar before pasting the ...

webkit/glue/webview_impl.cc

 // Copyright (c) 2007-2009 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.
 
 #include "config.h"
 #include "build/build_config.h"
 
 #include "base/compiler_specific.h"
 MSVC_PUSH_WARNING_LEVEL(0);
 #include "CSSStyleSelector.h"
@@ skipping 531 matching lines @@
   //   Firefox: pastes on up.
   //   Midori: couldn't paste at all with 0.1.2
   //
   // There is something of a webcompat angle to this well, as highlighted by
   // crbug.com/14608. Pages can clear text boxes 'onclick' and, if we paste on
   // down then the text is pasted just before the onclick handler runs and
   // clears the text box. So it's important this happens after the
   // handleMouseReleaseEvent() earlier in this function
   if (event.button == WebMouseEvent::ButtonMiddle) {
     Frame* focused = GetFocusedWebCoreFrame();
-    if (focused) {
+    IntPoint click_point(last_mouse_down_point_.x, last_mouse_down_point_.y);
+    HitTestResult hit_test_result =
+      focused->eventHandler()->hitTestResultAtPoint(click_point, false, false,
+                                                    ShouldHitTestScrollbars);
+    if (!hit_test_result.scrollbar() && focused) {
       Editor* editor = focused->editor();
       if (editor && editor->canEdit())
         delegate_->PasteFromSelectionClipboard();
     }
   }
 #endif
 
   mouseCaptureLost();
   main_frame()->frame()->eventHandler()->handleMouseReleaseEvent(
       PlatformMouseEventBuilder(main_frame()->frameview(), event));
@@ skipping 1317 matching lines @@
 
   return document->focusedNode();
 }
 
 HitTestResult WebViewImpl::HitTestResultForWindowPos(const IntPoint& pos) {
   IntPoint doc_point(
       page_->mainFrame()->view()->windowToContents(pos));
   return page_->mainFrame()->eventHandler()->
       hitTestResultAtPoint(doc_point, false);
 }