[All-in-one patch] Implement own grapheme boundary breaker for editing.

third_party/WebKit/Source/core/core.gypi

Index: third_party/WebKit/Source/core/core.gypi
diff --git a/third_party/WebKit/Source/core/core.gypi b/third_party/WebKit/Source/core/core.gypi
index 06f3f85ab2f65b2af057c693a20c0f04141eaff2..257611572b550963eb12e23e955c931b96de9730 100644
--- a/third_party/WebKit/Source/core/core.gypi
+++ b/third_party/WebKit/Source/core/core.gypi
@@ -1594,8 +1594,14 @@
             'editing/spellcheck/TextCheckingHelper.h',
             'editing/state_machines/BackspaceStateMachine.cpp',
             'editing/state_machines/BackspaceStateMachine.h',
+            'editing/state_machines/BackwardGraphemeBoundaryStateMachine.cpp',
+            'editing/state_machines/BackwardGraphemeBoundaryStateMachine.h',
+            'editing/state_machines/ForwardGraphemeBoundaryStateMachine.cpp',
+            'editing/state_machines/ForwardGraphemeBoundaryStateMachine.h',
             'editing/state_machines/TextSegmentationMachineState.cpp',
             'editing/state_machines/TextSegmentationMachineState.h',
+            'editing/state_machines/StateMachineUtil.cpp',
+            'editing/state_machines/StateMachineUtil.h',
             'fetch/AccessControlStatus.h',
             'fetch/CSSStyleSheetResource.cpp',
             'fetch/CSSStyleSheetResource.h',
@@ -3966,6 +3972,9 @@
             'editing/serializers/StyledMarkupSerializerTest.cpp',
             'editing/spellcheck/SpellCheckerTest.cpp',
             'editing/state_machines/BackspaceStateMachineTest.cpp',
+            'editing/state_machines/BackwardGraphemeBoundaryStateMachineTest.cpp',
+            'editing/state_machines/ForwardGraphemeBoundaryStateMachineTest.cpp',
+            'editing/state_machines/StateMachineUtilTest.cpp',
             'events/EventPathTest.cpp',
             'events/PointerEventFactoryTest.cpp',
             'fetch/CachingCorrectnessTest.cpp',