Build headless chrome without video support by default.

There is little point of decoding video if nobody is going to watch it.
Also helps excersize "no video" build configuration that tends to break.

Change-Id: I01bdb08b8b9822ce6eb8182bba3b8d7a94705eb3
Reviewed-on: https://chromium-review.googlesource.com/625537
Commit-Queue: Sergei Datsenko <dats@chromium.org>
Reviewed-by: Dale Curtis <dalecurtis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#496619}

media/BUILD.gn

@@ -330,7 +330,6 @@ test("media_unittests") {
     "//media/audio:unit_tests",
     "//media/base:unit_tests",
     "//media/cdm:unit_tests",
-    "//media/ffmpeg:unit_tests",
     "//media/gpu:unit_tests",
     "//media/mojo:unit_tests",
     "//media/renderers:unit_tests",
@@ -339,6 +338,10 @@ test("media_unittests") {
     "//media/video:unit_tests",
   ]
 
+  if (media_use_ffmpeg) {
+    deps += [ "//media/ffmpeg:unit_tests" ]
+  }
+
   if (is_android) {
     deps += [
       # The test needs the java dependencies to add the java classes for their

media/base/decode_capabilities.cc

@@ -14,8 +14,8 @@
 // backwards compatibility for legacy applications using the library.
 #define VPX_CODEC_DISABLE_COMPAT 1
 extern "C" {
-#include "third_party/libvpx/source/libvpx/vpx/vp8dx.h"
-#include "third_party/libvpx/source/libvpx/vpx/vpx_codec.h"
+#include "third_party/libvpx/source/libvpx/vpx/vp8dx.h"      // nogncheck
+#include "third_party/libvpx/source/libvpx/vpx/vpx_codec.h"  // nogncheck
 }
 #endif
 

media/base/media.cc

@@ -17,7 +17,7 @@
 #endif
 
 #if !defined(MEDIA_DISABLE_FFMPEG)
-#include "third_party/ffmpeg/ffmpeg_features.h"
+#include "third_party/ffmpeg/ffmpeg_features.h"  // nogncheck
 extern "C" {
 #include <libavutil/cpu.h>
 #include <libavutil/log.h>

media/media_options.gni

@@ -22,7 +22,6 @@ media_subcomponent_deps = [
   "//media/base/android",
   "//media/cdm",
   "//media/device_monitors",
-  "//media/ffmpeg",
   "//media/filters",
   "//media/formats",
   "//media/muxers",
@@ -96,6 +95,10 @@ declare_args() {
 # enable_hls_sample_aes can only be true if enable_mse_mpeg2ts_stream_parser is.
 assert(enable_mse_mpeg2ts_stream_parser || !enable_hls_sample_aes)
 
+if (media_use_ffmpeg) {
+  media_subcomponent_deps += [ "//media/ffmpeg" ]
+}
+
 # Use a second declare_args() to pick up possible overrides of |use_cras|.
 declare_args() {
   # Enables runtime selection of PulseAudio library.