[chromecast] Add CAST_PRODUCT_TYPE controlled at build time.

Review URL: https://codereview.chromium.org/1095683002

Cr-Commit-Position: refs/heads/master@{#325521}

chromecast/chromecast.gyp

@@ -8,6 +8,8 @@
         '../third_party/android_tools/android_tools.gyp:android_support_v13_javalib',
     'cast_build_release': 'internal/build/cast_build_release',
     'cast_is_debug_build%': 0,
+    # Refers to enum CastProductType in components/metrics/proto/cast_logs.proto
+    'cast_product_type%': 0,  # CAST_PRODUCT_TYPE_UNKNOWN
     'chromium_code': 1,
     'chromecast_branding%': 'Chromium',
     'disable_display%': 0,
@@ -338,6 +340,7 @@
             # otherwise, a dev string is used.
             '-e', 'CAST_BUILD_RELEASE="<!(if test -f <(cast_build_release); then cat <(cast_build_release); else echo eng.${USER}; fi)"',
             '-e', 'CAST_IS_DEBUG_BUILD=1 if "<(CONFIGURATION_NAME)" == "Debug" or <(cast_is_debug_build) == 1 else 0',
+            '-e', 'CAST_PRODUCT_TYPE=<(cast_product_type)',
             'common/version.h.in',
             '<@(_outputs)',
           ],

chromecast/common/version.h.in

@@ -11,5 +11,6 @@
 #define CAST_BUILD_INCREMENTAL "@CAST_BUILD_INCREMENTAL@"
 #define CAST_BUILD_REVISION "@CAST_BUILD_RELEASE@.@CAST_BUILD_INCREMENTAL@"
 #define CAST_IS_DEBUG_BUILD() @CAST_IS_DEBUG_BUILD@
+#define CAST_PRODUCT_TYPE @CAST_PRODUCT_TYPE@
 
 #endif  // CHROMECAST_COMMON_VERSION_INFO_H_