ImageCapture: Implement TakePhoto() for Linux/CrOs

media/capture/BUILD.gn

 # Copyright 2016 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/features.gni")
 import("//media/media_options.gni")
 import("//testing/test.gni")
 
 component("capture") {
   defines = [ "CAPTURE_IMPLEMENTATION" ]
@@ skipping 13 matching lines @@
     "content/video_capture_oracle.h",
     "video/fake_video_capture_device.cc",
     "video/fake_video_capture_device.h",
     "video/fake_video_capture_device_factory.cc",
     "video/fake_video_capture_device_factory.h",
     "video/file_video_capture_device.cc",
     "video/file_video_capture_device.h",
     "video/file_video_capture_device_factory.cc",
     "video/file_video_capture_device_factory.h",
     "video/linux/v4l2_capture_delegate.cc",
+    "video/linux/v4l2_capture_delegate.h",
     "video/linux/video_capture_device_chromeos.cc",
     "video/linux/video_capture_device_chromeos.h",
     "video/linux/video_capture_device_factory_linux.cc",
     "video/linux/video_capture_device_factory_linux.h",
     "video/linux/video_capture_device_linux.cc",
     "video/linux/video_capture_device_linux.h",
     "video/mac/video_capture_device_avfoundation_mac.h",
     "video/mac/video_capture_device_avfoundation_mac.mm",
     "video/mac/video_capture_device_decklink_mac.h",
     "video/mac/video_capture_device_decklink_mac.mm",
@@ skipping 80 matching lines @@
     ]
     ldflags = [
       "/DELAYLOAD:mf.dll",
       "/DELAYLOAD:mfplat.dll",
       "/DELAYLOAD:mfreadwrite.dll",
     ]
 
     # TODO(jschuh): https://crbug.com/167187 fix size_t to int truncations.
     configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
   }
+
+  if (is_linux || is_chromeos) {
+    deps += [ "//third_party/libyuv" ]
+  }
 }
 
 test("capture_unittests") {
   sources = [
     "content/animated_content_sampler_unittest.cc",
     "content/capture_resolution_chooser_unittest.cc",
     "content/smooth_event_sampler_unittest.cc",
     "content/video_capture_oracle_unittest.cc",
     "video/fake_video_capture_device_unittest.cc",
     "video/mac/video_capture_device_factory_mac_unittest.mm",
@@ skipping 16 matching lines @@
       "//media/capture/video/android",
       "//media/capture/video/android:capture_java",
     ]
   }
 
   if (is_win) {
     # TODO(jschuh): https://crbug.com/167187 fix size_t to int truncations.
     configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
   }
 }