[PE] Correct anchor position in printed subframe

When a subframe initiates printing, all coordinates should be in the
subframe's space, so we should not map anchors to the root frame.

Bug: 808057

Change-Id: I8714cfaddc1bd5471da2561f69ef92994d57c559
Reviewed-on: https://chromium-review.googlesource.com/894464
Commit-Queue: Xianzhu Wang <wangxianzhu@chromium.org>
Reviewed-by: David Bokan <bokan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#533723}

third_party/WebKit/ManualTests/resources/print-subframe.html

-<p>This text in the subframe should be printed.</p>

third_party/WebKit/ManualTests/window-print-subframe.html

-<script>
-    window.onload = function() { frames[0].print(); }
-</script>
-<p>This text in the main frame should not be printed.</p>
-<iframe src="resources/print-subframe.html">
+<p style="height: 2000px">
+This text in the main frame should not be printed
+when the sub frame (scroll  down to see it) initiates printing.
+</p>
+<iframe srcdoc="
+  <p>This <a href='#target'>link</a> in the subframe should be printed.</p>
+  <button onclick='print()'>Print</button>
+  <p>In the saved pdf, clicking the above link should navigate to the page containing 'TARGET'</p>
+  <div style='height: 2000px'></div>
+  <a name='target'>TARGET</a>
+  <div style='height: 2000px'></div>
+  <script>
+    setTimeout(function() { window.print(); }, 500);
+  </script>">
+</iframe>

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

@@ -226,16 +226,9 @@ void PrintContext::OutputLinkedDestinations(GraphicsContext& context,
     LayoutObject* layout_object = entry.value->GetLayoutObject();
     if (!layout_object || !layout_object->GetFrameView())
       continue;
-    IntRect bounding_box = layout_object->AbsoluteBoundingBoxRect();
-    // TODO(bokan): |bounding_box| looks to be in content coordinates but
-    // ConvertToRootFrame() doesn't apply scroll offsets when converting up to
-    // the root frame.
-    IntPoint point = layout_object->GetFrameView()->ConvertToRootFrame(
-        bounding_box.Location());
-    if (!page_rect.Contains(point))
-      continue;
-    point.ClampNegativeToZero();
-    context.SetURLDestinationLocation(entry.key, point);
+    IntPoint anchor_point = layout_object->AbsoluteBoundingBoxRect().Location();
+    if (page_rect.Contains(anchor_point))
+      context.SetURLDestinationLocation(entry.key, anchor_point);
   }
 }