Making PageSerializer operate on single frames only.

third_party/WebKit/Source/core/page/PageSerializer.h

Index: third_party/WebKit/Source/core/page/PageSerializer.h
diff --git a/third_party/WebKit/Source/core/page/PageSerializer.h b/third_party/WebKit/Source/core/page/PageSerializer.h
index 501d99f509edbf3c654d92bea6453d31d2bd7b70..fa662e3ce28a39c0d4b2f83ad340803cff0febc7 100644
--- a/third_party/WebKit/Source/core/page/PageSerializer.h
+++ b/third_party/WebKit/Source/core/page/PageSerializer.h
@@ -58,8 +58,9 @@ class StylePropertySet;
 
 struct SerializedResource;
 
-// This class is used to serialize a page contents back to text (typically HTML).
-// It serializes all the page frames and retrieves resources such as images and CSS stylesheets.
+// This class is used to serialize frame's contents back to text (typically HTML).
+// It serializes frame's document and resources such as images and CSS stylesheets.
+// TODO(lukasza): Rename this class to FrameSerializer.
 class CORE_EXPORT PageSerializer final {
     STACK_ALLOCATED();
 public:
@@ -72,10 +73,11 @@ public:
 
     PageSerializer(Vector<SerializedResource>*, PassOwnPtr<Delegate>);
 
-    // Initiates the serialization of the frame's page. All serialized content and retrieved
-    // resources are added to the Vector passed to the constructor. The first resource in that
-    // vector is the top frame serialized content.
-    void serialize(Page*);
+    // Initiates the serialization of the frame. All serialized content and
+    // retrieved resources are added to the Vector passed to the constructor.
+    // The first resource in that vector is the frame's serialized content.
+    // Subsequent resources are images, css, etc.
+    void serializeFrame(LocalFrame*);

[dcheng, 2015/11/12 23:47:32]

LocalFrame&. Calling this with a null frame is an error.

[Łukasz Anforowicz, 2015/11/13 00:22:10]

Good point.  Done.

 
     void registerRewriteURL(const String& from, const String& to);
     void setRewriteURLFolder(const String&);
@@ -87,8 +89,6 @@ public:
     static String markOfTheWebDeclaration(const KURL&);
 
 private:
-    void serializeFrame(LocalFrame*);
-
     // Serializes the stylesheet back to text and adds it to the resources if URL is not-empty.
     // It also adds any resources included in that stylesheet (including any imported stylesheets and their own resources).
     void serializeCSSStyleSheet(CSSStyleSheet&, const KURL&);