Stretching NativeViewHost, and misc tab capture fixes.

content/browser/web_contents/web_contents_view_mac.mm

Index: content/browser/web_contents/web_contents_view_mac.mm
diff --git a/content/browser/web_contents/web_contents_view_mac.mm b/content/browser/web_contents/web_contents_view_mac.mm
index 1d01ac835dbe810121a24de1a4014f1bd4de4307..96b76b72252b9aaa5c257ac7b0983e8123632b87 100644
--- a/content/browser/web_contents/web_contents_view_mac.mm
+++ b/content/browser/web_contents/web_contents_view_mac.mm
@@ -154,17 +154,22 @@ - (void)viewDidBecomeFirstResponder:(NSNotification*)notification;
 }
 
 void WebContentsViewMac::GetContainerBounds(gfx::Rect* out) const {
-  NSWindow* window = [cocoa_view_.get() window];
-  NSRect bounds = [cocoa_view_.get() bounds];
-  if (window)  {
-    // Convert bounds to window coordinate space.
-    bounds = [cocoa_view_.get() convertRect:bounds toView:nil];
-
-    // Convert bounds to screen coordinate space.
-    bounds = [window convertRectToScreen:bounds];
+  // Note: This implementation should pretty much do the exact same thing that
+  // is found in RenderWidgetHostViewMac::GetViewBounds().
+
+  const NSRect bounds = [cocoa_view_.get() bounds];
+  const gfx::Size size(NSWidth(bounds), NSHeight(bounds));
+  NSWindow* const window = [cocoa_view_.get() window];
+  if (!window) {
+    *out = gfx::Rect(size);
+    return;
   }
 
-  *out = gfx::ScreenRectFromNSRect(bounds);
+  NSRect boundsInScreen = [cocoa_view_.get() convertRect:bounds toView:nil];
+  boundsInScreen = [window convertRectToScreen:boundsInScreen];
+  const gfx::Point origin = gfx::ScreenRectFromNSRect(boundsInScreen).origin();
+
+  *out = gfx::Rect(origin, size);
 }
 
 void WebContentsViewMac::StartDragging(