Remove WEBKIT_DLL and replace it with COMPONENT_BUILD

Source/WebKit/chromium/WebKitUnitTests.gyp

Index: Source/WebKit/chromium/WebKitUnitTests.gyp
diff --git a/Source/WebKit/chromium/WebKitUnitTests.gyp b/Source/WebKit/chromium/WebKitUnitTests.gyp
index 3e08135598b869e3d6849a1c2cc3baab1c5defd3..41e597ffe6e79e9f36ee1e988d7e3601257865f8 100644
--- a/Source/WebKit/chromium/WebKitUnitTests.gyp
+++ b/Source/WebKit/chromium/WebKitUnitTests.gyp
@@ -63,11 +63,7 @@
                 'src',
             ],
             'conditions': [
-                ['component=="shared_library"', {
-                    'defines': [
-                        'WEBKIT_DLL_UNITTEST',

[darin (slow to review), 2013/06/19 21:05:47]

I think this change nuked webkit_unit_tests in the component=shared_library
build.  Now, webkit_unit_tests has no tests!  The WEBKIT_DLL_UNITTEST define was
needed so that RunAllTests.cpp would know to find the tests in webkit.dll
instead of inside webkit_unit_tests.exe.

[jamesr, 2013/06/19 21:06:52]

Yikes, that's right!  Why did you remove this, Jochen?  It doesn't seem related
to the rest of the patch.

[jochen (gone - plz use gerrit), 2013/06/20 10:49:12]

OMG, that was a careless mistake :-/

Sorry about that and thanks for fixing

-                    ],
-                }, {
+                ['component!="shared_library"', {
                     'dependencies': [
                         '../../core/core.gyp:webcore',
                     ],