Add third_party/angle to merged project list.

Chromium needs third_party/angle again.

Change-Id: I886614fe0bf538b69e0a4cbda58edc59de526c36
diff --git a/chromium/tools/merge_common.py b/chromium/tools/merge_common.py
index 82306c6..e0bda24 100644
--- a/chromium/tools/merge_common.py
+++ b/chromium/tools/merge_common.py
@@ -36,6 +36,7 @@
 THIRD_PARTY_PROJECTS_WITH_FULL_HISTORY = [
     'sdch/open-vcdiff',
     'testing/gtest',
+    'third_party/angle',
     'third_party/angle_dx11',
     'third_party/eyesfree/src/android/java/src/com/googlecode/eyesfree/braille',
     'third_party/freetype',