Fix crash when computing media controls width for out of process iframe

third_party/WebKit/Source/core/layout/LayoutMedia.cpp

Index: third_party/WebKit/Source/core/layout/LayoutMedia.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutMedia.cpp b/third_party/WebKit/Source/core/layout/LayoutMedia.cpp
index ec6bad08ae71453cc5c87243ecbb1eb4c266616d..1ba695f653116c3c001ae59c7f833f3de8aaba60 100644
--- a/third_party/WebKit/Source/core/layout/LayoutMedia.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutMedia.cpp
@@ -159,6 +159,11 @@ void LayoutMedia::setRequestPositionUpdates(bool want) {
 }
 
 LayoutUnit LayoutMedia::computePanelWidth(const LayoutRect& mediaRect) const {
+  // TODO(mlamouri): we don't know if the main frame has an horizontal scrollbar
+  // if it is out of process. See https://crbug.com/662480
+  if (document().page()->mainFrame()->isRemoteFrame())
+    return mediaRect.width();
+
   FrameHost* frameHost = document().frameHost();
   LocalFrame* mainFrame = document().page()->deprecatedLocalMainFrame();
   FrameView* pageView = mainFrame ? mainFrame->view() : nullptr;