Stretching NativeViewHost, and misc tab capture fixes.

ui/views/controls/native/native_view_host_aura.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 UI_VIEWS_CONTROLS_NATIVE_NATIVE_VIEW_HOST_AURA_H_
 #define UI_VIEWS_CONTROLS_NATIVE_NATIVE_VIEW_HOST_AURA_H_
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_observer.h"
+#include "ui/gfx/transform.h"
 #include "ui/views/controls/native/native_view_host_wrapper.h"
 #include "ui/views/views_export.h"
 
 namespace views {
 
 class NativeViewHost;
 
 // Aura implementation of NativeViewHostWrapper.
 class VIEWS_EXPORT NativeViewHostAura : public NativeViewHostWrapper,
                                         public aura::WindowObserver {
  public:
   explicit NativeViewHostAura(NativeViewHost* host);
   ~NativeViewHostAura() override;
 
   // Overridden from NativeViewHostWrapper:
   void AttachNativeView() override;
   void NativeViewDetaching(bool destroyed) override;
   void AddedToWidget() override;
   void RemovedFromWidget() override;
   void InstallClip(int x, int y, int w, int h) override;
   bool HasInstalledClip() override;
   void UninstallClip() override;
-  void ShowWidget(int x, int y, int w, int h) override;
+  void ShowWidget(int x, int y, int w, int h, int render_w, int render_h)
+      override;
   void HideWidget() override;
   void SetFocus() override;
   gfx::NativeViewAccessible GetNativeViewAccessible() override;
   gfx::NativeCursor GetCursor(int x, int y) override;
 
  private:
   friend class NativeViewHostAuraTest;
 
   class ClippingWindowDelegate;
 
@@ skipping 13 matching lines @@
   NativeViewHost* host_;
 
   std::unique_ptr<ClippingWindowDelegate> clipping_window_delegate_;
 
   // Window that exists between the native view and the parent that allows for
   // clipping to occur. This is positioned in the coordinate space of
   // host_->GetWidget().
   aura::Window clipping_window_;
   std::unique_ptr<gfx::Rect> clip_rect_;
 
+  // Set when AttachNativeView() is called. This is the original transform of
+  // the NativeView's layer. The NativeView's layer may be modified to scale
+  // when ShowWidget() is called with a rendering size not equal to the region's
+  // size. When NativeViewDetaching() is called, the NativeView's
+  // transform is restored to this.
+  gfx::Transform original_transform_;
+
   DISALLOW_COPY_AND_ASSIGN(NativeViewHostAura);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_NATIVE_NATIVE_VIEW_HOST_AURA_H_