Roll chromium_revision 226126:228675 and fix clang warnings

By request from thakis@chromium.org, I disabled the
-Wno-unused-const-variable setting that is set in Chromium's
common.gypi so we can prepare our code for it's removal.

This required some cleanup in order to get the code to compile
with Clang having the -Wunused-const-variable warning enabled.

TEST=all trybots passing
BUG=none
R=niklas.enbom@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/2400004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@4966 4adac7df-926f-26a2-2b94-8c16560cd09d

webrtc/modules/audio_processing/test/audio_processing_unittest.cc

@@ -55,12 +55,12 @@ namespace {
 // be set to true with the command-line switch --write_ref_data.
 #ifdef WEBRTC_AUDIOPROC_BIT_EXACT
 bool write_ref_data = false;
+const int kChannels[] = {1, 2};
+const size_t kChannelsSize = sizeof(kChannels) / sizeof(*kChannels);
 #endif
 
 const int kSampleRates[] = {8000, 16000, 32000};
 const size_t kSampleRatesSize = sizeof(kSampleRates) / sizeof(*kSampleRates);
-const int kChannels[] = {1, 2};
-const size_t kChannelsSize = sizeof(kChannels) / sizeof(*kChannels);
 
 #if defined(WEBRTC_AUDIOPROC_FIXED_PROFILE)
 // AECM doesn't support super-wb.