Make various string_util functions take StringPieces instead of char[].

chrome/renderer/chrome_render_view_observer.cc

Index: chrome/renderer/chrome_render_view_observer.cc
diff --git a/chrome/renderer/chrome_render_view_observer.cc b/chrome/renderer/chrome_render_view_observer.cc
index ea3d0c50bcd1488ea72b1419a6c70d6f72488097..03eee04556a062248efc3c5e9914a790b6dadace 100644
--- a/chrome/renderer/chrome_render_view_observer.cc
+++ b/chrome/renderer/chrome_render_view_observer.cc
@@ -558,9 +558,8 @@ void ChromeRenderViewObserver::CaptureText(WebFrame* frame,
   // terminate the string at the last space to ensure no words are clipped.
   if (contents->size() == kMaxIndexChars) {
     size_t last_space_index = contents->find_last_of(base::kWhitespaceUTF16);
-    if (last_space_index == base::string16::npos)
-      return;  // don't index if we got a huge block of text with no spaces
-    contents->resize(last_space_index);
+    if (last_space_index != base::string16::npos)
+      contents->resize(last_space_index);
   }
 }