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

content/browser/renderer_host/render_widget_host_view_mac.mm

 // 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/browser/renderer_host/render_widget_host_view_mac.h"
 
 #include <QuartzCore/QuartzCore.h>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 466 matching lines @@
 gfx::NativeViewId RenderWidgetHostViewMac::GetNativeViewId() const {
   return reinterpret_cast<gfx::NativeViewId>(GetNativeView());
 }
 
 gfx::NativeViewAccessible RenderWidgetHostViewMac::GetNativeViewAccessible() {
   NOTIMPLEMENTED();
   return static_cast<gfx::NativeViewAccessible>(NULL);
 }
 
 void RenderWidgetHostViewMac::MovePluginWindows(
-    const gfx::Point& scroll_offset,
+    const gfx::Vector2d& scroll_offset,
     const std::vector<webkit::npapi::WebPluginGeometry>& moves) {
   TRACE_EVENT0("browser", "RenderWidgetHostViewMac::MovePluginWindows");
   CHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   // Handle movement of accelerated plugins, which are the only "windowed"
   // plugins that exist on the Mac.
   for (std::vector<webkit::npapi::WebPluginGeometry>::const_iterator iter =
            moves.begin();
        iter != moves.end();
        ++iter) {
     webkit::npapi::WebPluginGeometry geom = *iter;
@@ skipping 2808 matching lines @@
   if (!string) return NO;
 
   // If the user is currently using an IME, confirm the IME input,
   // and then insert the text from the service, the same as TextEdit and Safari.
   [self confirmComposition];
   [self insertText:string];
   return YES;
 }
 
 @end