Cleanup: Remove "gray text" logic from Omnibox

chrome/browser/ui/cocoa/location_bar/autocomplete_text_field.h

Index: chrome/browser/ui/cocoa/location_bar/autocomplete_text_field.h
diff --git a/chrome/browser/ui/cocoa/location_bar/autocomplete_text_field.h b/chrome/browser/ui/cocoa/location_bar/autocomplete_text_field.h
index f17405bddbf2d42fa5233d8e970dc70a403a82f7..a9f1a5f81c984f5886314c92e9c81ba5cd265b69 100644
--- a/chrome/browser/ui/cocoa/location_bar/autocomplete_text_field.h
+++ b/chrome/browser/ui/cocoa/location_bar/autocomplete_text_field.h
@@ -169,12 +169,6 @@ class AutocompleteTextFieldObserver {
 // via -[NSView addToolTipRect:owner:userData:].
 - (void)addToolTip:(NSString*)tooltip forRect:(NSRect)aRect;
 
-// Sets the suggest text that shows at the end of the field's normal text.
-// This can't be simply appended to the field's text storage because that
-// will end any pending IME session.
-- (void)setGrayTextAutocompletion:(NSString*)suggestText
-                        textColor:(NSColor*)suggestColor;
-
 - (NSString*)suggestText;
 - (NSColor*)suggestColor;
 
@@ -183,15 +177,4 @@ class AutocompleteTextFieldObserver {
 
 @end
 
-namespace autocomplete_text_field {
-
-// Draw gray text suggestion in |controlView|.
-void DrawGrayTextAutocompletion(NSAttributedString* mainText,
-                                NSString* suggestText,
-                                NSColor* suggestColor,
-                                NSView* controlView,
-                                NSRect frame);
-
-}  // namespace autocomplete_text_field
-
 #endif  // CHROME_BROWSER_UI_COCOA_AUTOCOMPLETE_TEXT_FIELD_H_