Add chromecast_build gyp variable and add rules when the variable is set to 1.

build/common.gypi

Index: build/common.gypi
diff --git a/build/common.gypi b/build/common.gypi
index 166130c6e231d0f813b5d306ed1db1ff91661451..0a3ffd32b9d445fff4403fac6f6f39adfde8283a 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -21,6 +21,9 @@
             # Whether we're building a ChromeOS build.
             'chromeos%': 0,
 
+            # Whether we're building the cast (chromecast) shell
+            'chromecast%': 0,
+
             # Whether or not we are using the Aura windowing framework.
             'use_aura%': 0,
 
@@ -43,10 +46,14 @@
               }, {
                 'host_arch%': '<!pymod_do_main(detect_host_arch)',
               }],
+              ['chromecast==1', {
+                'embedded%': 1,
+              }],
             ],
           },
           # Copy conditionally-set variables out one scope.
           'chromeos%': '<(chromeos)',
+          'chromecast%': '<(chromecast)',
           'use_aura%': '<(use_aura)',
           'use_ash%': '<(use_ash)',
           'use_cras%': '<(use_cras)',
@@ -126,6 +133,7 @@
         },
         # Copy conditionally-set variables out one scope.
         'chromeos%': '<(chromeos)',
+        'chromecast%': '<(chromecast)',
         'desktop_linux%': '<(desktop_linux)',
         'use_aura%': '<(use_aura)',
         'use_ash%': '<(use_ash)',
@@ -237,6 +245,7 @@
 
       # Copy conditionally-set variables out one scope.
       'chromeos%': '<(chromeos)',
+      'chromecast%': '<(chromecast)',
       'host_arch%': '<(host_arch)',
       'target_arch%': '<(target_arch)',
       'target_subarch%': '<(target_subarch)',
@@ -707,9 +716,9 @@
         }],
 
         # Android OS includes support for proprietary codecs regardless of
-        # building Chromium or Google Chrome. We also ship Google Chrome with
-        # proprietary codecs.
-        ['OS=="android" or branding=="Chrome"', {
+        # building Chromium or Google Chrome. We also ship Google Chrome and
+        # Chromecast with proprietary codecs.
+        ['OS=="android" or branding=="Chrome" or chromecast==1', {
           'proprietary_codecs%': 1,
         }, {
           'proprietary_codecs%': 0,
@@ -923,10 +932,10 @@
         }],
 
         # By default, use ICU data file (icudtl.dat) on all platforms
-        # except when building Android WebView.
+        # except when building Android WebView or Chromecast.
         # TODO(jshin): Handle 'use_system_icu' on Linux (Chromium).
         # Set the data reduction proxy origin for Android Webview.
-        ['android_webview_build==0', {
+        ['android_webview_build==0 and chromecast==0', {
           'icu_use_data_file_flag%' : 1,
           'spdy_proxy_auth_origin%': '',
           'data_reduction_proxy_probe_url%': '',
@@ -1028,6 +1037,7 @@
     'use_gnome_keyring%': '<(use_gnome_keyring)',
     'linux_fpic%': '<(linux_fpic)',
     'chromeos%': '<(chromeos)',
+    'chromecast%': '<(chromecast)',
     'enable_viewport%': '<(enable_viewport)',
     'enable_hidpi%': '<(enable_hidpi)',
     'use_xi2_mt%':'<(use_xi2_mt)',
@@ -1747,6 +1757,19 @@
         # Copy it out one scope.
         'android_webview_build%': '<(android_webview_build)',
       }],  # OS=="android"
+      ['chromecast==1', {
+        'ffmpeg_branding%': 'Chrome',
+        'ozone_platform_ozonex%': 1,

[rjkroege, 2014/06/25 16:44:16]

where is this platform?

[spang, 2014/06/25 16:53:28]

This is a gyp hack to allow X dependencies in ozone builds. See
build/linux/system.gyp for why this is here.

+        'conditions': [
+          ['target_arch=="arm"', {
+            'arm_arch%': '',
+            'arm_tune%': 'cortex-a9',
+            'arm_thumb%': 1,
+            'enable_mpeg2ts_stream_parser%': 1,
+            'video_hole%': 1,
+          }],
+        ],
+      }],
       ['android_webview_build==1', {
         # When building the WebView in the Android tree, jarjar will remap all
         # the class names, so the JNI generator needs to know this.
@@ -1874,7 +1897,7 @@
         ],
       }],
 
-      ['os_posix==1 and chromeos==0 and OS!="android" and OS!="ios"', {
+      ['os_posix==1 and chromeos==0 and OS!="android" and OS!="ios" and chromecast==0', {

[rjkroege, 2014/06/25 16:44:16]

cups is for printing yes? I think you get this turned off for free with
embedded=1. If not, embedded should be updated to turn off  cups. 

[lcwu1, 2014/06/25 22:41:02]

I don't think it is turned off when embedded==1. I can change chromecast==0 to
embedded==0 here.

         'use_cups%': 1,
       }, {
         'use_cups%': 0,
@@ -2283,6 +2306,8 @@
 
       'component%': '<(component)',
 
+      'chromecast%': '<(chromecast)',
+
       # See http://msdn.microsoft.com/en-us/library/aa652360(VS.71).aspx
       'win_release_Optimization%': '2', # 2 = /Os
       'win_debug_Optimization%': '0',   # 0 = /Od
@@ -2661,6 +2686,21 @@
           }],
         ],  # win_z7!=0
       }],  # OS==win
+      ['chromecast==1', {
+        'defines': [
+          'LOG_DISABLED=0',

[rjkroege, 2014/06/25 16:44:16]

why?

[lcwu1, 2014/06/25 22:41:02]

Because we don't want to disable all the logs from WebKit in release/non-debug
mode. (Note that this macro alone won't enable all the logs. It just allows us
to enable logging for individual WebKit log channel when needed/desired.)

+        ],
+        'conditions': [
+          ['target_arch=="arm"', {
+            'defines': [
+              # TODO(lcwu): Work around an error when building Chromium

[rjkroege, 2014/06/25 16:44:16]

it would be a good idea to have a bug that goes with this TODO

[lcwu1, 2014/06/25 22:41:02]

Will create one.

+              # with gcc-4.5.3 (e.g. v8/src/platform-linux.cc). Remove
+              # this define once the toolchain is updated.
+              '__SOFTFP',
+            ],
+          }],
+        ],
+      }],
       ['enable_task_manager==1', {
         'defines': [
           'ENABLE_TASK_MANAGER=1',
@@ -3701,6 +3741,33 @@
                       }],
                     ],
                   }],
+                  ['chromecast==1', {
+                    'cflags': [

[rjkroege, 2014/06/25 16:44:16]

this block would seem also be temporary? i.e. it could have a TODO and have a
tracking bug?

[lcwu1, 2014/06/25 22:41:02]

This block is not temporary. I only added this big chunk of comments to explain
why we don't have an "-march" flag here (which is unnecessary anyway given that
we have specified a more detailed cpu implementation, cortex-a9).

+                      # We set arm_arch to "" so that -march compiler option
+                      # is not set.  Otherwise a gcc bug that would complain
+                      # about it conflicting with '-mcpu=cortex-a9'. The flag
+                      # '-march=armv7-a' is actually redundant anyway because
+                      # it is enabled by default when we built the toolchain.
+                      # And using '-mcpu=cortex-a9' should be sufficient.
+                      '-mcpu=cortex-a9',
+                      '-funwind-tables',
+                      # Breakpad requires symbols with debugging information
+                      '-g',
+                    ],
+                    'ldflags': [
+                      # We want to statically link libstdc++/libgcc_s.
+                      '-static-libstdc++',
+                      '-static-libgcc',
+                    ],
+                    'cflags!': [
+                      # Some components in Chromium (e.g. v8, skia, ffmpeg)
+                      # define their own cflags for arm builds that could
+                      # conflict with the flags we set here (e.g.
+                      # '-mcpu=cortex-a9'). Remove these flags explicitly.
+                      '-march=armv7-a',
+                      '-mtune=cortex-a8',
+                    ],
+                  }],
                 ],
               }],
             ],