Limit the background trials upload size to 100Kib when using mobile data

chrome/browser/tracing/crash_service_uploader.h

Index: chrome/browser/tracing/crash_service_uploader.h
diff --git a/chrome/browser/tracing/crash_service_uploader.h b/chrome/browser/tracing/crash_service_uploader.h
index cfff0933d116c8f33c249d6015c80739eb9f4bc1..eb555f195aa471cd36cd429d0b23ad8777db7d86 100644
--- a/chrome/browser/tracing/crash_service_uploader.h
+++ b/chrome/browser/tracing/crash_service_uploader.h
@@ -33,6 +33,8 @@ class TraceCrashServiceUploader : public content::TraceUploader,
 
   void SetUploadURL(const std::string& url);
 
+  void SetMaxUploadBytes(size_t max_upload_bytes);
+
   // net::URLFetcherDelegate implementation.
   void OnURLFetchComplete(const net::URLFetcher* source) override;
   void OnURLFetchUploadProgress(const net::URLFetcher* source,
@@ -82,6 +84,8 @@ class TraceCrashServiceUploader : public content::TraceUploader,
 
   std::string upload_url_;
 
+  size_t max_upload_bytes_;
+
   DISALLOW_COPY_AND_ASSIGN(TraceCrashServiceUploader);
 };