[chromedriver] Improve timeout behavior. Prompted by user who executes script on busy page.

chrome/test/chromedriver/util.cc

Index: chrome/test/chromedriver/util.cc
diff --git a/chrome/test/chromedriver/util.cc b/chrome/test/chromedriver/util.cc
index 3bde66eb41f42362e2546f5dca9ca36cd8e4709b..454949e79e58c02e4368568867116667b30b9e89 100644
--- a/chrome/test/chromedriver/util.cc
+++ b/chrome/test/chromedriver/util.cc
@@ -117,6 +117,8 @@ class DataOutputStream {
   }
 
   void WriteBytes(const void* bytes, int size) {
+    if (!size)
+      return;
     size_t next = buffer_.length();
     buffer_.resize(next + size);
     memcpy(&buffer_[next], bytes, size);
@@ -150,6 +152,8 @@ class DataInputStream {
     if (iter_ + length > size_)
       return false;
     data->resize(length);
+    if (length == 0)
+      return true;
     return ReadBytes(&(*data)[0], length);
   }