Tighten up compile warnings based to match other chromium sub-projects....

remoting/base/multiple_array_input_stream_unittest.cc

Index: remoting/base/multiple_array_input_stream_unittest.cc
===================================================================
--- remoting/base/multiple_array_input_stream_unittest.cc	(revision 49812)
+++ remoting/base/multiple_array_input_stream_unittest.cc	(working copy)
@@ -9,8 +9,8 @@
 
 namespace remoting {
 
-static int ReadFromInput(MultipleArrayInputStream* input,
-                         void* data, int size) {
+static size_t ReadFromInput(MultipleArrayInputStream* input,
+                         void* data, size_t size) {
   uint8* out = reinterpret_cast<uint8*>(data);
   int out_size = size;