Fix Windows x64 errors in video_codecs_test_framework

Fixed a few size_t converted to int warnings (interpreted as errors).
Fixed cpplint warnings.

BUG=webrtc:1323
TEST=manual compile on Windows with GYP_DEFINES=target_arch=x64 and
ninja -C out\Debug_x64 (also compiled with Release_x64)

Review URL: https://webrtc-codereview.appspot.com/1097011

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@3507 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/test/testsupport/frame_reader.cc b/test/testsupport/frame_reader.cc
index 8fea9f3..1736b8a 100644
--- a/test/testsupport/frame_reader.cc
+++ b/test/testsupport/frame_reader.cc
@@ -12,13 +12,13 @@
 
 #include <cassert>
 
-#include "testsupport/fileutils.h"
+#include "webrtc/test/testsupport/fileutils.h"
 
 namespace webrtc {
 namespace test {
 
 FrameReaderImpl::FrameReaderImpl(std::string input_filename,
-                                 int frame_length_in_bytes)
+                                 size_t frame_length_in_bytes)
     : input_filename_(input_filename),
       frame_length_in_bytes_(frame_length_in_bytes),
       input_file_(NULL) {