Spellchecking should not be cancelled if editing is done in between

chrome/renderer/spellchecker/spellcheck_provider.cc

Index: chrome/renderer/spellchecker/spellcheck_provider.cc
diff --git a/chrome/renderer/spellchecker/spellcheck_provider.cc b/chrome/renderer/spellchecker/spellcheck_provider.cc
index 576460e8dbe025b12abf2170c26ccb7e76a7883e..6702acad803db78b474424544eec3a17e17c7c00 100644
--- a/chrome/renderer/spellchecker/spellcheck_provider.cc
+++ b/chrome/renderer/spellchecker/spellcheck_provider.cc
@@ -6,6 +6,7 @@
 
 #include "base/command_line.h"
 #include "base/metrics/histogram.h"
+#include "base/strings/utf_string_conversions.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/spellcheck_marker.h"
 #include "chrome/common/spellcheck_messages.h"
@@ -315,8 +316,9 @@ bool SpellCheckProvider::SatisfyRequestFromCache(
       return true;
     }
     int code = 0;
-    int length = static_cast<int>(text_length);
-    U16_PREV(text.data(), 0, length, code);
+    base::string16 requested_text = text + base::UTF8ToUTF16(" ");
+    int length = static_cast<int>(requested_text.length());
+    U16_PREV(requested_text.data(), 0, length, code);
     UErrorCode error = U_ZERO_ERROR;
     if (uscript_getScript(code, &error) != USCRIPT_COMMON) {
       completion->didCancelCheckingText();