Switch Chrome to dlopen() the Google Chrome Framework.framework.

chrome/chrome_dll.gypi

Index: chrome/chrome_dll.gypi
diff --git a/chrome/chrome_dll.gypi b/chrome/chrome_dll.gypi
index b0422e4f6669a27b0763f7f14542a7dc3c23e568..b2a2081929c6bff4aadbc4a51d6fa80037ecc3fb 100644
--- a/chrome/chrome_dll.gypi
+++ b/chrome/chrome_dll.gypi
@@ -3,6 +3,35 @@
 # found in the LICENSE file.
 {
   'conditions': [
+    # Dummy target to allow chrome to require chrome_dll to build
+    # without actually linking to the library
+    ['OS=="mac"', {
+      'targets': [
+        {
+          'target_name': 'chrome_dll_dependency_shim',
+          'type': 'executable',
+          'dependencies': [
+            'chrome_dll',
+          ],
+          # In release, we end up with a strip step that is unhappy if there is
+          # no binary. Rather than check in a new file for this hack, just
+          # generate a source file on the fly.
+          'actions': [
+            {
+              'action_name': 'generate_stub_main',
+              'process_outputs_as_sources': 1,
+              'inputs': [],
+              'outputs': [ '<(INTERMEDIATE_DIR)/dummy_main.c' ],
+              'action': [
+                'bash', '-c',
+                'echo "int main() { return 0; }" > <(INTERMEDIATE_DIR)/dummy_main.c'
+              ],
+            },
+          ],
+        },
+      ],
+     },
+    ],
     ['OS=="mac" or OS=="win"', {
       'targets': [
         {