[sensors] Drop DEVICE_SENSOR_EXPORT macro

It is not needed as 'generic_sensor' is build as a source set and it causes linker warnings on windows component build.

BUG=640769

Review-Url: https://codereview.chromium.org/2277353002
Cr-Commit-Position: refs/heads/master@{#414714}

device/generic_sensor/BUILD.gn

@@ -12,15 +12,12 @@ source_set("generic_sensor") {
     "platform_sensor_provider_base.cc",
     "platform_sensor_provider_base.h",
     "platform_sensor_provider_default.cc",
-    "sensor_export.h",
     "sensor_impl.cc",
     "sensor_impl.h",
     "sensor_provider_impl.cc",
     "sensor_provider_impl.h",
   ]
 
-  defines = [ "DEVICE_GENERIC_SENSOR_IMPLEMENTATION" ]
-
   deps = [
     "//base",
     "//device/generic_sensor/public/interfaces",

device/generic_sensor/platform_sensor_configuration.h

@@ -6,11 +6,10 @@
 #define DEVICE_GENERIC_SENSOR_PLATFORM_SENSOR_CONFIGURATION_H_
 
 #include "base/logging.h"
-#include "device/generic_sensor/sensor_export.h"
 
 namespace device {
 
-class DEVICE_SENSOR_EXPORT PlatformSensorConfiguration {
+class PlatformSensorConfiguration {
  public:
   PlatformSensorConfiguration();
   explicit PlatformSensorConfiguration(double frequency);

device/generic_sensor/public/interfaces/sensor.typemap

@@ -3,10 +3,7 @@
 # found in the LICENSE file.
 
 mojom = "//device/generic_sensor/public/interfaces/sensor.mojom"
-public_headers = [
-  "//device/generic_sensor/platform_sensor_configuration.h",
-  "//device/generic_sensor/sensor_export.h",
-]
+public_headers = [ "//device/generic_sensor/platform_sensor_configuration.h" ]
 traits_headers =
     [ "//device/generic_sensor/public/interfaces/sensor_struct_traits.h" ]
 sources = [

device/generic_sensor/sensor_export.h

-// 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.
-
-#ifndef DEVICE_GENERIC_SENSOR_SENSOR_EXPORT_H_
-#define DEVICE_GENERIC_SENSOR_SENSOR_EXPORT_H_
-
-#if defined(COMPONENT_BUILD)
-#if defined(WIN32)
-
-#if defined(DEVICE_GENERIC_SENSOR_IMPLEMENTATION)
-#define DEVICE_SENSOR_EXPORT __declspec(dllexport)
-#else
-#define DEVICE_SENSOR_EXPORT __declspec(dllimport)
-#endif  // defined(DEVICE_GENERIC_SENSOR_IMPLEMENTATION)
-
-#else  // defined(WIN32)
-#if defined(DEVICE_GENERIC_SENSOR_IMPLEMENTATION)
-#define DEVICE_SENSOR_EXPORT __attribute__((visibility("default")))
-#else
-#define DEVICE_SENSOR_EXPORT
-#endif
-#endif
-
-#else  // defined(COMPONENT_BUILD)
-#define DEVICE_SENSOR_EXPORT
-#endif
-
-#endif  // DEVICE_GENERIC_SENSOR_SENSOR_EXPORT_H_

device/generic_sensor/sensor_provider_impl.h

@@ -7,7 +7,6 @@
 
 #include "base/macros.h"
 #include "device/generic_sensor/public/interfaces/sensor_provider.mojom.h"
-#include "device/generic_sensor/sensor_export.h"
 #include "mojo/public/cpp/bindings/strong_binding.h"
 
 namespace device {
@@ -19,8 +18,7 @@ class PlatformSensorProvider;
 // of PlatformSensor which are used by SensorImpl.
 class SensorProviderImpl final : public mojom::SensorProvider {
  public:
-  DEVICE_SENSOR_EXPORT static void Create(
-      mojo::InterfaceRequest<mojom::SensorProvider> request);
+  static void Create(mojo::InterfaceRequest<mojom::SensorProvider> request);
 
   ~SensorProviderImpl() override;