Move linker settings from standalone.gypi to pdfium.gyp, since they're needed when linking pdfium_test as part of other projects' gyp files as well where standalone.gypi isn't used.

R=scottmg@chromium.org

Review URL: https://codereview.chromium.org/302453004

build/standalone.gypi

diff --git a/build/standalone.gypi b/build/standalone.gypi
index d919c16..ef85c5e 100644
--- a/build/standalone.gypi
+++ b/build/standalone.gypi
@@ -186,11 +186,6 @@
         #   1 == /SUBSYSTEM:CONSOLE
         #   2 == /SUBSYSTEM:WINDOWS
         'SubSystem': '1',
-        'AdditionalDependencies': [
-          'advapi32.lib',
-          'gdi32.lib',
-          'user32.lib',
-        ],
       },
     },
     'xcode_settings': {
@@ -242,12 +237,6 @@
     }],  # OS=="win"
     ['OS=="mac"', {
       'target_defaults': {
-        'link_settings': {
-          'libraries': [
-            '$(SDKROOT)/System/Library/Frameworks/AppKit.framework',
-            '$(SDKROOT)/System/Library/Frameworks/CoreFoundation.framework',
-          ],
-        },
         'target_conditions': [
           ['_type!="static_library"', {
             'xcode_settings': {'OTHER_LDFLAGS': ['-Wl,-search_paths_first']},

pdfium.gyp

diff --git a/pdfium.gyp b/pdfium.gyp
index 9f2cd3d..1b0bae0 100644
--- a/pdfium.gyp
+++ b/pdfium.gyp
@@ -119,7 +119,24 @@
             'fpdfsdk/src/fpdfsdkdll.rc',
           ],
         }],
+        ['OS=="mac"', {
+          'link_settings': {
+            'libraries': [
+              '$(SDKROOT)/System/Library/Frameworks/AppKit.framework',
+              '$(SDKROOT)/System/Library/Frameworks/CoreFoundation.framework',
+            ],
+          },
+        }],
       ],
+      'msvs_settings': {
+        'VCLinkerTool': {
+          'AdditionalDependencies': [
+            'advapi32.lib',
+            'gdi32.lib',
+            'user32.lib',
+          ],
+        },
+      },
     },
     {
       'target_name': 'fdrm',