Refactor PDFiumPage::GetLinkTarget() into smaller methods.

pdf/pdfium/pdfium_page.h

Index: pdf/pdfium/pdfium_page.h
diff --git a/pdf/pdfium/pdfium_page.h b/pdf/pdfium/pdfium_page.h
index 7dfa79c448307e7f844f4f7091dea5ba38a148a6..28249c852145b0c7523c4e7bc4b24848a747677f 100644
--- a/pdf/pdfium/pdfium_page.h
+++ b/pdf/pdfium/pdfium_page.h
@@ -119,6 +119,8 @@ class PDFiumPage {
   Area GetLinkTarget(FPDF_LINK link, LinkTarget* target) const;
   // Returns target associated with a destination.
   Area GetDestinationTarget(FPDF_DEST destination, LinkTarget* target) const;
+  // Returns target associated with a URI action.
+  Area GetURITarget(FPDF_ACTION uri_action, LinkTarget* target) const;
 
   class ScopedLoadCounter {
    public: