Fix product name for ChromeOS slow reports.

On ChromeOS builds, defined(OS_LINUX) also evalutes to true, so
defined(OS_CHROMEOS) must come first in order to ensure that the correct product
name is set.

Change-Id: I17e15b4aafc486d6b09ce5745a9f86638afe0b65
Reviewed-on: https://chromium-review.googlesource.com/1053961Reviewed-by: oysteine <oysteine@chromium.org>
Commit-Queue: Erik Chen <erikchen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#557655}

chrome/browser/tracing/crash_service_uploader.cc

@@ -150,12 +150,14 @@ void TraceCrashServiceUploader::DoCompressOnBackgroundThread(
   const char product[] = "Chrome";
 #elif defined(OS_MACOSX)
   const char product[] = "Chrome_Mac";
+#elif defined(OS_CHROMEOS)
+  // On ChromeOS, defined(OS_LINUX) also evalutes to true, so the
+  // defined(OS_CHROMEOS) block must come first.
+  const char product[] = "Chrome_ChromeOS";
 #elif defined(OS_LINUX)
   const char product[] = "Chrome_Linux";
 #elif defined(OS_ANDROID)
   const char product[] = "Chrome_Android";
-#elif defined(OS_CHROMEOS)
-  const char product[] = "Chrome_ChromeOS";
 #else
 #error Platform not supported.
 #endif