Retrieve chrome build info in GCMProfileService, instead of GCMDriver

google_apis/gcm/gcm_client.cc

Index: google_apis/gcm/gcm_client.cc
diff --git a/google_apis/gcm/gcm_client.cc b/google_apis/gcm/gcm_client.cc
index dd2a31688d3b88cf9bcdc95cf9cb83376ed5fdb7..93a2d07d42b440db0c18cf08caa4591992a30213 100644
--- a/google_apis/gcm/gcm_client.cc
+++ b/google_apis/gcm/gcm_client.cc
@@ -6,6 +6,14 @@
 
 namespace gcm {
 
+GCMClient::ChromeBuildInfo::ChromeBuildInfo()
+    : platform(PLATFORM_UNKNOWN),
+      channel(CHANNEL_UNKNOWN) {
+}
+
+GCMClient::ChromeBuildInfo::~ChromeBuildInfo() {
+}
+
 GCMClient::OutgoingMessage::OutgoingMessage()
     : time_to_live(kMaximumTTL) {
 }