[sensors] Introduce Generic Sensor API interfaces

content/browser/DEPS

 include_rules = [
   # Allow inclusion of specific components that we depend on.
   # See comment in content/DEPS for which components are allowed.
   "+components/filesystem",
   "+components/leveldb",
   "+components/link_header_util",
   "+components/memory_coordinator/browser",
   "+components/memory_coordinator/common",
   "+components/mime_util",
   "+components/profile_service",
   "+components/scheduler/common",
   "+components/tracing",
   "+components/url_formatter",
 
   "+content/app/strings/grit",  # For generated headers
   "+content/public/browser",
   "+device/battery",  # For battery status service.
   "+device/gamepad", # For gamepad API
+  "+device/generic_sensor",  # For sensors service.
   "+device/geolocation",
   "+device/power_save_blocker",
   "+device/sensors/public",
   "+device/vibration",  # For Vibration API
   "+device/vr",  # For WebVR API
   "+gin/v8_initializer.h",
   "+mojo",
   "+services",
   "+sql",
   "+ui/aura_extra",
@@ skipping 81 matching lines @@
 
   # Until we define where mojo interfaces should live in blink we whitelist each
   # one separately.
   "+third_party/WebKit/public/platform/modules/bluetooth/web_bluetooth.mojom.h",
   "+third_party/WebKit/public/platform/modules/notifications/notification_service.mojom.h",
 
   # DO NOT ADD ANY CHROME OR COMPONENTS INCLUDES HERE!!!
   # See https://sites.google.com/a/chromium.org/dev/developers/content-module
   # for more information.
 ]