Fix "unused variable" warnings.

chrome/browser/android/compositor/decoration_title.h

Index: chrome/browser/android/compositor/decoration_title.h
diff --git a/chrome/browser/android/compositor/decoration_title.h b/chrome/browser/android/compositor/decoration_title.h
index 12056ec8ab90e3e26f7d5a18262cb34aabf428e8..f007f434777ac134af5b27c367a4ede190a416e4 100644
--- a/chrome/browser/android/compositor/decoration_title.h
+++ b/chrome/browser/android/compositor/decoration_title.h
@@ -27,12 +27,9 @@ class ResourceManager;
 namespace chrome {
 namespace android {
 
-class LayerTitleCache;
-
 class DecorationTitle {
  public:
-  DecorationTitle(LayerTitleCache* layer_title_cache,
-                  ui::ResourceManager* resource_manager,
+  DecorationTitle(ui::ResourceManager* resource_manager,
                   int title_resource_id,
                   int favicon_resource_id,
                   int spinner_resource_id,
@@ -88,8 +85,6 @@ class DecorationTitle {
 
   ui::ResourceManager* resource_manager_;
 
-  LayerTitleCache* layer_title_cache_;
-
   DISALLOW_COPY_AND_ASSIGN(DecorationTitle);
 };