handler/mac: Support the in-Chromium component=shared_library

handler/handler.gyp

Index: handler/handler.gyp
diff --git a/handler/handler.gyp b/handler/handler.gyp
index ac1bfb61b88b853ebfaafcff2837bd57b9738506..638789c40f7e6a89765fdeae76f3580277bf6335 100644
--- a/handler/handler.gyp
+++ b/handler/handler.gyp
@@ -15,6 +15,7 @@
 {
   'includes': [
     '../build/crashpad.gypi',
+    '../build/crashpad_in_chromium.gypi',
   ],
   'conditions': [
     ['OS=="mac"', {
@@ -43,6 +44,28 @@
             'mac/exception_handler_server.h',
             'mac/main.cc',
           ],
+
+	  # In an in-Chromium build with component=shared_library,
+	  # crashpad_handler will depend on shared libraries such as
+	  # libbase.dylib located in out/{Debug,Release} via the @rpath
+	  # mechanism. When crashpad_handler is copied to its home deep inside
+	  # the Chromium app bundle, it needs to have an LC_RPATH command
+	  # pointing back to the directory containing these dependency
+	  # libraries.
+          'variables': {
+            'component%': 'static_library',
+          },
+          'conditions': [
+            ['crashpad_in_chromium!=0 and component=="shared_library"', {
+              'xcode_settings': {
+                'LD_RUNPATH_SEARCH_PATHS': [  # -Wl,-rpath
+                  # Get back from
+                  # Chromium.app/Contents/Versions/V/Framework.framework/Helpers
+                  '@loader_path/../../../../../..',
+                ],
+              },
+            }],
+          ],
         },
       ],
     }, {