In BUILD.public, specify alwayslink for skia library.

BUILD.public

 # Description:
 #   Skia graphics library.
 #
 #   Definitions for Google BUILD file.
 
 exports_files(["BUILD.public"])
 
 # Platform-independent SRCS
 SRCS = glob(
     [
@@ skipping 72 matching lines @@
         "src/opts/*SSSE3*",
         "src/opts/*ssse3*",
         # Included in :opts_sse4 library.
         "src/opts/*SSE4*",
         "src/opts/*sse4*",
         "src/opts/SkBitmapProcState_opts_none.cpp",
         "src/opts/SkBlitMask_opts_none.cpp",
         "src/opts/SkBlitRow_opts_none.cpp",
         "src/ports/*android*",
         "src/ports/*chromium*",
-        "src/ports/*CG*",
         "src/ports/*fontconfig*",
         "src/ports/*FontConfig*",
         "src/ports/*mac*",
         "src/ports/*mozalloc*",
         "src/ports/*nacl*",
         "src/ports/*win*",
         "src/ports/SkFontMgr_custom_embedded_factory.cpp",
         "src/ports/SkFontMgr_empty_factory.cpp",
+        "src/ports/SkImageDecoder_CG.cpp",
         "src/ports/SkImageDecoder_WIC.cpp",
         "src/ports/SkImageDecoder_empty.cpp",
         "src/ports/SkImageGenerator_none.cpp",
         "src/ports/SkTLS_none.cpp",
     ],
 )
 
 # Platform-dependent SRCS for google3-default Android.
 SRCS_ANDROID = glob(
     [
@@ skipping 10 matching lines @@
         "src/opts/*SSE2*",
         "src/opts/*SSSE3*",
         "src/opts/*ssse3*",
         "src/opts/*SSE4*",
         "src/opts/*sse4*",
         "src/opts/*x86*",
         "src/opts/SkBitmapProcState_opts_none.cpp",
         "src/opts/SkBlitMask_opts_none.cpp",
         "src/opts/SkBlitRow_opts_none.cpp",
         "src/ports/*chromium*",
-        "src/ports/*CG*",
         "src/ports/*fontconfig*",
         "src/ports/*FontConfig*",
         "src/ports/*mac*",
         "src/ports/*mozalloc*",
         "src/ports/*nacl*",
         "src/ports/*win*",
         "src/ports/SkDebug_stdio.cpp",
         "src/ports/SkFontMgr_custom_directory_factory.cpp",
         "src/ports/SkFontMgr_custom_embedded_factory.cpp",
         "src/ports/SkFontMgr_empty_factory.cpp",
+        "src/ports/SkImageDecoder_CG.cpp",
         "src/ports/SkImageDecoder_WIC.cpp",
         "src/ports/SkImageDecoder_empty.cpp",
         "src/ports/SkImageGenerator_none.cpp",
         "src/ports/SkTLS_none.cpp",
     ],
 )
 
 PLATFORM_SRCS = select({
     CONDITION_ANDROID: SRCS_ANDROID,
     "//conditions:default": SRCS_UNIX,
@@ skipping 210 matching lines @@
 cc_library(
     name = "skia",
     srcs = SRCS + PLATFORM_SRCS,
     hdrs = HDRS,
     copts = COPTS,
     defines = DEFINES,
     includes = INCLUDES,
     linkopts = LINKOPTS,
     visibility = [":skia_clients"],
     deps = DEPS,
+    alwayslink = 1,
 )
 
 cc_test(
     name = "dm",
     size = "large",
     srcs = DM_SRCS + DM_PLATFORM_SRCS,
     args = [
         "--nogpu",
         "--verbose",
         # TODO(mtklein): maybe investigate why these fail?
         "--match ~FontMgr ~Scalar ~Canvas ~Codec_stripes ~Codec_Dimensions ~Codec ~Stream ~skps ~Math ~RecordDraw_TextBounds",
         "--resourcePath %s/resources" % BASE_DIR,
         "--images %s/resources" % BASE_DIR,
     ],
     copts = COPTS,
     data = glob(["resources/**/*"]),
     defines = DEFINES,
     includes = DM_INCLUDES,
     deps = DM_EXTERNAL_DEPS + [
         ":skia",
     ] + EXTERNAL_DEPS_ALL,
 )