Prepare gyp_chromium for WebCore move

We're about to move Source/WebCore to Source/core. This file has a dependency
on the name "WebCore" and therefore needs to be updated before the move.

Review URL: https://codereview.chromium.org/13949009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@194448 0039d316-1c4b-4281-b951-d872f2087c98

build/gyp_chromium

@@ -27,6 +27,8 @@ sys.path.insert(1, os.path.join(chrome_src, 'chrome', 'tools', 'build'))
 sys.path.insert(1, os.path.join(chrome_src, 'native_client', 'build'))
 sys.path.insert(1, os.path.join(chrome_src, 'third_party', 'WebKit',
     'Source', 'WebCore', 'WebCore.gyp', 'scripts'))
+sys.path.insert(1, os.path.join(chrome_src, 'third_party', 'WebKit',
+    'Source', 'core', 'core.gyp', 'scripts'))
 
 
 # On Windows, Psyco shortens warm runs of build/gyp_chromium by about