Propagate scrolling/marginwidth/marginheight property values to child frame.

third_party/WebKit/public/web/WebFrameOwnerProperties.h

Index: third_party/WebKit/public/web/WebFrameOwnerProperties.h
diff --git a/third_party/WebKit/public/platform/WebImageGenerator.h b/third_party/WebKit/public/web/WebFrameOwnerProperties.h
similarity index 71%
copy from third_party/WebKit/public/platform/WebImageGenerator.h
copy to third_party/WebKit/public/web/WebFrameOwnerProperties.h
index bb17f4d6df96a2dcc73efa069d2c6646a2338ab9..fb13c7cf899baf3a94f7b4dda69c5c409a7edf9b 100644
--- a/third_party/WebKit/public/platform/WebImageGenerator.h
+++ b/third_party/WebKit/public/web/WebFrameOwnerProperties.h
@@ -28,19 +28,36 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef WebImageGenerator_h
-#define WebImageGenerator_h
+#ifndef WebFrameOwnerProperties_h
+#define WebFrameOwnerProperties_h
 
-#include "WebCommon.h"
+namespace blink {
 
-class SkData;
-class SkImageGenerator;
+struct WebFrameOwnerProperties {
+    enum class ScrollingMode {
+        Auto,
+        AlwaysOff,
+        AlwaysOn,
+        Last = AlwaysOn
+    };
 
-namespace blink {
+    ScrollingMode scrollingMode;
+    int marginWidth;
+    int marginHeight;
+
+    WebFrameOwnerProperties()
+        : scrollingMode(ScrollingMode::Auto)
+        , marginWidth(-1)
+        , marginHeight(-1)
+    {
+    }
 
-class BLINK_EXPORT WebImageGenerator {
-public:
-    static SkImageGenerator* create(SkData*);
+    WebFrameOwnerProperties(ScrollingMode scrollingMode, int marginWidth, int marginHeight)

[dcheng, 2015/10/12 04:50:01]

I'd add a #if INSIDE_BLINK constructor that delegates to this one, with the
first constructor taking a blink::ScrollbarMode. This makes it easier for people
calling into this inside Blink.

[lazyboy, 2015/10/13 21:59:08]

Done.

+        : scrollingMode(scrollingMode)
+        , marginWidth(marginWidth)
+        , marginHeight(marginHeight)
+    {
+    }
 };
 
 } // namespace blink