- Add MayBlock() method to stream classes which is used as a hint when determining the thread to access the stream from (issue #1187).

- In cases where MayBlock() returns true have CefStreamResourceReader perform the reads on the FILE thread (issue #1187).

git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@1582 5089003a-bbd8-11dd-ad1f-f1f9622dbc98

include/wrapper/cef_byte_read_handler.h

@@ -60,6 +60,7 @@ class CefByteReadHandler : public CefReadHandler {
   virtual int Seek(int64 offset, int whence) OVERRIDE;
   virtual int64 Tell() OVERRIDE;
   virtual int Eof() OVERRIDE;
+  virtual bool MayBlock() OVERRIDE { return false; }
 
  private:
   const unsigned char* bytes_;