Implement layoutTestController.numberOfPages.

webkit/glue/webkit_glue.cc

Index: webkit/glue/webkit_glue.cc
diff --git a/webkit/glue/webkit_glue.cc b/webkit/glue/webkit_glue.cc
index d5dee65d50c5a08e9d36452de0dc508cf8f590c1..9e718a7eb18ebffd7233dc91deeabe7d2950d0dc 100644
--- a/webkit/glue/webkit_glue.cc
+++ b/webkit/glue/webkit_glue.cc
@@ -142,6 +142,15 @@ int PageNumberForElementById(WebFrame* web_frame,
                                              page_height_in_pixels);
 }
 
+int NumberOfPages(WebFrame* web_frame,
+                  float page_width_in_pixels,
+                  float page_height_in_pixels) {
+  WebSize size(page_width_in_pixels, page_height_in_pixels);
+  int number_of_pages = web_frame->printBegin(size);
+  web_frame->printEnd();
+  return number_of_pages;
+}
+
 std::wstring DumpFrameScrollPosition(WebFrame* web_frame, bool recursive) {
   gfx::Size offset = web_frame->scrollOffset();
   std::wstring result;