Update code that previously constructed strings from string iterators only to...

chrome/renderer/webplugin_delegate_pepper.cc

 // Copyright (c) 2010 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.
 
 #define PEPPER_APIS_ENABLED 1
 
 #include "chrome/renderer/webplugin_delegate_pepper.h"
 
 #include <string>
 #include <vector>
@@ skipping 596 matching lines @@
     static const int kBytesPixel = 4;
     int32 row_count = context->dirty.bottom - context->dirty.top;
     int32 stride = context->dirty.right - context->dirty.left;
     size_t length = row_count * stride * kBytesPixel;
     MD5Digest md5_result;   // 128-bit digest
     MD5Sum(context->region, length, &md5_result);
     std::string hex_md5 = MD5DigestToBase16(md5_result);
     // Return the least significant 8 characters (i.e. 4 bytes)
     // of the 32 character hexadecimal result as an int.
     int int_val;
-    base::HexStringToInt(hex_md5.substr(24), &int_val);
+    DCHECK_EQ(hex_md5.length(), 32u);
+    base::HexStringToInt(hex_md5.begin() + 24, hex_md5.end(), &int_val);
     *value = int_val;
     return NPERR_NO_ERROR;
   }
   return NPERR_GENERIC_ERROR;
 }
 
 NPError WebPluginDelegatePepper::Device2DFlushContext(
     NPP id,
     NPDeviceContext2D* context,
     NPDeviceFlushContextCallbackPtr callback,
@@ skipping 1131 matching lines @@
   CGRect bounds;
   bounds.origin.x = dest_rect.x();
   bounds.origin.y = canvas_height - dest_rect.y() - dest_rect.height();
   bounds.size.width = dest_rect.width();
   bounds.size.height = dest_rect.height();
 
   CGContextDrawImage(canvas, bounds, image);
   CGContextRestoreGState(canvas);
 }
 #endif  // defined(OS_MACOSX)