Add Vector2d classes that represent offsets, instead of using Point.

content/plugin/webplugin_proxy.cc

 // 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.
 
 #include "content/plugin/webplugin_proxy.h"
 
 #include "build/build_config.h"
 
 #include "base/bind.h"
 #include "base/lazy_instance.h"
@@ skipping 331 matching lines @@
   if (!windowless_context())
     return;
 #else
   if (!windowless_canvas() || !windowless_canvas()->getDevice())
     return;
 #endif
 
   // Clear the damaged area so that if the plugin doesn't paint there we won't
   // end up with the old values.
   gfx::Rect offset_rect = rect;
-  offset_rect.Offset(delegate_->GetRect().origin());
+  offset_rect.Offset(delegate_->GetRect().OffsetFromOrigin());
 #if defined(OS_MACOSX)
   CGContextSaveGState(windowless_context());
   // It is possible for windowless_contexts_ to change during plugin painting
   // (since the plugin can make a synchronous call during paint event handling),
   // in which case we don't want to try to restore later. Not an owning ref
   // since owning the ref without owning the shared backing memory doesn't make
   // sense, so this should only be used for pointer comparisons.
   CGContextRef saved_context_weak = windowless_context();
   // We also save the buffer index for the comparison because if we flip buffers
   // but haven't reallocated them then we do need to restore the context because
@@ skipping 420 matching lines @@
   int input_type;
   gfx::Rect caret_rect;
   if (!delegate_->GetIMEStatus(&input_type, &caret_rect))
     return;
 
   Send(new PluginHostMsg_NotifyIMEStatus(route_id_, input_type, caret_rect));
 }
 #endif
 
 }  // namespace content