Only scroll on main if the targeted frames need to scroll on main

third_party/WebKit/Source/core/page/Page.cpp

Index: third_party/WebKit/Source/core/page/Page.cpp
diff --git a/third_party/WebKit/Source/core/page/Page.cpp b/third_party/WebKit/Source/core/page/Page.cpp
index 0fb749217d8d06e6504136175415ac9bfb220106..9cc2e648370228d88bb3fad6463767e9386e5871 100644
--- a/third_party/WebKit/Source/core/page/Page.cpp
+++ b/third_party/WebKit/Source/core/page/Page.cpp
@@ -42,6 +42,7 @@
 #include "core/html/HTMLMediaElement.h"
 #include "core/inspector/ConsoleMessageStorage.h"
 #include "core/inspector/InspectorInstrumentation.h"
+#include "core/layout/LayoutView.h"

[pdr., 2016/12/13 05:51:16]

Nit: Is this needed anymore?

[yigu, 2016/12/14 21:07:27]

Done.

 #include "core/layout/TextAutosizer.h"
 #include "core/page/AutoscrollController.h"
 #include "core/page/ChromeClient.h"
@@ -164,9 +165,9 @@ ScrollingCoordinator* Page::scrollingCoordinator() {
   return m_scrollingCoordinator.get();
 }
 
-String Page::mainThreadScrollingReasonsAsText() {
+String Page::mainThreadScrollingReasonsAsText(const Frame& frame) {
   if (ScrollingCoordinator* scrollingCoordinator = this->scrollingCoordinator())
-    return scrollingCoordinator->mainThreadScrollingReasonsAsText();
+    return scrollingCoordinator->mainThreadScrollingReasonsAsText(&frame);
 
   return String();
 }