Support script modify iframe scrolling, marginWidth and marginHeight attr

third_party/WebKit/Source/core/html/HTMLFrameElementBase.cpp

Index: third_party/WebKit/Source/core/html/HTMLFrameElementBase.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLFrameElementBase.cpp b/third_party/WebKit/Source/core/html/HTMLFrameElementBase.cpp
index eb81d639c4de017fbb4adf4c46265078a85c0f43..3e0a3fc1acc79cd411d5799f18b0134086adcddf 100644
--- a/third_party/WebKit/Source/core/html/HTMLFrameElementBase.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLFrameElementBase.cpp
@@ -38,6 +38,7 @@
 #include "core/loader/FrameLoaderClient.h"
 #include "core/page/FocusController.h"
 #include "core/page/Page.h"
+#include "wtf/Optional.h"
 
 namespace blink {
 
@@ -117,8 +118,9 @@ void HTMLFrameElementBase::openURL(bool replaceCurrentItem) {
 void HTMLFrameElementBase::frameOwnerPropertiesChanged() {
   // Don't notify about updates if contentFrame() is null, for example when
   // the subframe hasn't been created yet.
-  if (contentFrame())
+  if (contentFrame()) {
     document().frame()->loader().client()->didChangeFrameOwnerProperties(this);
+  }
 }
 
 void HTMLFrameElementBase::parseAttribute(const QualifiedName& name,
@@ -141,16 +143,10 @@ void HTMLFrameElementBase::parseAttribute(const QualifiedName& name,
     m_frameName = value;
   } else if (name == nameAttr) {
     m_frameName = value;
-    // FIXME: If we are already attached, this doesn't actually change the
-    // frame's name.
-    // FIXME: If we are already attached, this doesn't check for frame name
-    // conflicts and generate a unique frame name.
   } else if (name == marginwidthAttr) {
     setMarginWidth(value.toInt());
-    // FIXME: If we are already attached, this has no effect.
   } else if (name == marginheightAttr) {
     setMarginHeight(value.toInt());
-    // FIXME: If we are already attached, this has no effect.
   } else if (name == scrollingAttr) {
     // Auto and yes both simply mean "allow scrolling." No means "don't allow
     // scrolling."
@@ -158,7 +154,6 @@ void HTMLFrameElementBase::parseAttribute(const QualifiedName& name,
       setScrollingMode(ScrollbarAuto);
     else if (equalIgnoringCase(value, "no"))
       setScrollingMode(ScrollbarAlwaysOff);
-    // FIXME: If we are already attached, this has no effect.
   } else if (name == onbeforeunloadAttr) {
     // FIXME: should <frame> elements have beforeunload handlers?
     setAttributeEventListener(
@@ -253,17 +248,38 @@ void HTMLFrameElementBase::defaultEventHandler(Event* event) {
 }
 
 void HTMLFrameElementBase::setScrollingMode(ScrollbarMode scrollbarMode) {
+  if (m_scrollingMode == scrollbarMode)
+    return;
+
   m_scrollingMode = scrollbarMode;
+  if (contentDocument()) {
+    contentDocument()->didChangeFrameOwnerProperties(WTF::nullopt, WTF::nullopt,
+                                                     true);
+  }
   frameOwnerPropertiesChanged();
 }
 
 void HTMLFrameElementBase::setMarginWidth(int marginWidth) {
+  if (m_marginWidth == marginWidth)
+    return;
+
   m_marginWidth = marginWidth;
+  if (contentDocument()) {
+    contentDocument()->didChangeFrameOwnerProperties(marginWidth, WTF::nullopt,
+                                                     false);
+  }
   frameOwnerPropertiesChanged();
 }
 
 void HTMLFrameElementBase::setMarginHeight(int marginHeight) {
+  if (m_marginHeight == marginHeight)
+    return;
+
   m_marginHeight = marginHeight;
+  if (contentDocument()) {
+    contentDocument()->didChangeFrameOwnerProperties(WTF::nullopt, marginHeight,
+                                                     false);
+  }
   frameOwnerPropertiesChanged();
 }