PDF: Fix potential bad indexes in find results.

pdf/out_of_process_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/out_of_process_instance.h"
 
 #include <algorithm>  // for min/max()
 #define _USE_MATH_DEFINES  // for M_PI
 #include <cmath>      // for log() and pow()
 #include <math.h>
@@ skipping 888 matching lines @@
   recently_sent_find_update_ = true;
   pp::CompletionCallback callback =
       timer_factory_.NewCallback(
           &OutOfProcessInstance::ResetRecentlySentFindUpdate);
   pp::Module::Get()->core()->CallOnMainThread(kFindResultCooldownMs,
                                               callback, 0);
 }
 
 void OutOfProcessInstance::NotifySelectedFindResultChanged(
     int current_find_index) {
+  DCHECK_GE(current_find_index, 0);
   SelectedFindResultChanged(current_find_index);
 }
 
 void OutOfProcessInstance::GetDocumentPassword(
     pp::CompletionCallbackWithOutput<pp::Var> callback) {
   if (password_callback_) {
     NOTREACHED();
     return;
   }
 
@@ skipping 443 matching lines @@
 pp::FloatPoint OutOfProcessInstance::BoundScrollOffsetToDocument(
     const pp::FloatPoint& scroll_offset) {
   float max_x = document_size_.width() * zoom_ - plugin_dip_size_.width();
   float x = std::max(std::min(scroll_offset.x(), max_x), 0.0f);
   float max_y = document_size_.height() * zoom_ - plugin_dip_size_.height();
   float y = std::max(std::min(scroll_offset.y(), max_y), 0.0f);
   return pp::FloatPoint(x, y);
 }
 
 }  // namespace chrome_pdf