Fix for #US#US issue in inprocess PDF case.

pdf/instance.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "pdf/instance.h"
 
 #include <algorithm>  // for min()
 #define _USE_MATH_DEFINES  // for M_PI
 #include <cmath>      // for log() and pow()
 #include <math.h>
@@ skipping 1208 matching lines @@
 void Instance::NavigateTo(const std::string& url, bool open_in_new_tab) {
   std::string url_copy(url);
 
   // Empty |url_copy| is ok, and will effectively be a reload.
   // Skip the code below so an empty URL does not turn into "http://", which
   // will cause GURL to fail a DCHECK.
   if (!url_copy.empty()) {
     // If |url_copy| starts with '#', then it's for the same URL with a
     // different URL fragment.
     if (url_copy[0] == '#') {
-      url_copy = url_ + url_copy;
+      // if '#' is already present in |url_| then remove old fragment and add
+      // new |url_copy| fragment.
+      std::size_t index = url_.find('#');
+      if (index != std::string::npos)
+        url_copy = url_.substr(0, index) + url_copy;
+      else
+        url_copy = url_ + url_copy;
       // Changing the href does not actually do anything when navigating in the
       // same tab, so do the actual page scroll here. Then fall through so the
       // href gets updated.
       if (!open_in_new_tab) {
         int page_number = GetInitialPage(url_copy);
         if (page_number >= 0)
           ScrollToPage(page_number);
       }
     }
     // If there's no scheme, add http.
@@ skipping 1563 matching lines @@
   return instance_->HasScriptableMethod(name, exception);
 }
 
 pp::Var PDFScriptableObject::Call(const pp::Var& method,
                                   const std::vector<pp::Var>& args,
                                   pp::Var* exception) {
   return instance_->CallScriptableMethod(method, args, exception);
 }
 
 }  // namespace chrome_pdf