Move LoadHTMLString method from WebFrame to WebLocalFrame.

third_party/WebKit/Source/web/tests/FrameTestHelpers.h

Index: third_party/WebKit/Source/web/tests/FrameTestHelpers.h
diff --git a/third_party/WebKit/Source/web/tests/FrameTestHelpers.h b/third_party/WebKit/Source/web/tests/FrameTestHelpers.h
index 8c752a52cf2463b0e5597e2713bd87f3384ff881..cf22912f0158255193c8e16200e3024dfd941435 100644
--- a/third_party/WebKit/Source/web/tests/FrameTestHelpers.h
+++ b/third_party/WebKit/Source/web/tests/FrameTestHelpers.h
@@ -68,8 +68,10 @@ class TestWebViewClient;
 // pending resource requests, as well as waiting for the threaded parser to
 // finish, before returning.
 void LoadFrame(WebFrame*, const std::string& url);
-// Same as above, but for WebFrame::loadHTMLString().
-void LoadHTMLString(WebFrame*, const std::string& html, const WebURL& base_url);
+// Same as above, but for WebLocalFrame::LoadHTMLString().
+void LoadHTMLString(WebLocalFrame*,
+                    const std::string& html,
+                    const WebURL& base_url);
 // Same as above, but for WebFrame::loadHistoryItem().
 void LoadHistoryItem(WebFrame*,
                      const WebHistoryItem&,