Stretching NativeViewHost, and misc tab capture fixes.

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"
 
 #import <Carbon/Carbon.h>
 #import <objc/runtime.h>
 #include <OpenGL/gl.h>
 #include <QuartzCore/QuartzCore.h>
@@ skipping 864 matching lines @@
 bool RenderWidgetHostViewMac::IsSurfaceAvailableForCopy() const {
   return browser_compositor_->GetDelegatedFrameHost()->CanCopyToBitmap();
 }
 
 bool RenderWidgetHostViewMac::IsShowing() {
   return ![cocoa_view_ isHidden];
 }
 
 gfx::Rect RenderWidgetHostViewMac::GetViewBounds() const {
   NSRect bounds = [cocoa_view_ bounds];
+  const gfx::Size size(NSWidth(bounds), NSHeight(bounds));
   // TODO(shess): In case of !window, the view has been removed from
   // the view hierarchy because the tab isn't main.  Could retrieve
   // the information from the main tab for our window.
   NSWindow* enclosing_window = ApparentWindowForView(cocoa_view_);
   if (!enclosing_window)
-    return gfx::Rect(gfx::Size(NSWidth(bounds), NSHeight(bounds)));
+    return gfx::Rect(size);
 
-  bounds = [cocoa_view_ convertRect:bounds toView:nil];
-  bounds = [enclosing_window convertRectToScreen:bounds];
-  return FlipNSRectToRectScreen(bounds);
+  NSRect boundsInScreen = [cocoa_view_ convertRect:bounds toView:nil];
+  boundsInScreen = [enclosing_window convertRectToScreen:boundsInScreen];
+  const gfx::Point origin = FlipNSRectToRectScreen(boundsInScreen).origin();
+
+  // Note: The GetViewBounds() API is a bit weird: The origin of the Rect is a
+  // point on the screen, in the screen's coordinate system. However, the size
+  // of the Rect is the rendering size, and not necessarily the size this view
+  // will occupy in the screen. The two may be different whenever this view is
+  // being scaled by any layer transforms in the ancestors in the hierarchy.
+  //
+  // TODO(miu): GetViewBounds() should be fixed because it's really returning
+  // two different things in one return value. Perhaps it should be deprecated
+  // in favor of GetRequestedRendererSize() and something new like
+  // GetPositionOnScreen()?
+  return gfx::Rect(origin, size);
 }
 
 void RenderWidgetHostViewMac::UpdateCursor(const WebCursor& cursor) {
   WebCursor web_cursor = cursor;
   [cocoa_view_ updateCursor:web_cursor.GetNativeCursor()];
 }
 
 void RenderWidgetHostViewMac::SetIsLoading(bool is_loading) {
   is_loading_ = is_loading;
   // If we ever decide to show the waiting cursor while the page is loading
@@ skipping 2549 matching lines @@
 
 // "-webkit-app-region: drag | no-drag" is implemented on Mac by excluding
 // regions that are not draggable. (See ControlRegionView in
 // native_app_window_cocoa.mm). This requires the render host view to be
 // draggable by default.
 - (BOOL)mouseDownCanMoveWindow {
   return YES;
 }
 
 @end