Add the ability to clear the shader disk cache.

chrome/browser/browsing_data/browsing_data_remover.cc

Index: chrome/browser/browsing_data/browsing_data_remover.cc
diff --git a/chrome/browser/browsing_data/browsing_data_remover.cc b/chrome/browser/browsing_data/browsing_data_remover.cc
index d7775964d9ef28866cc8da6896519c6712728df0..0a62a4b09d2305b7765330594bbe2b4db9d6f083 100644
--- a/chrome/browser/browsing_data/browsing_data_remover.cc
+++ b/chrome/browser/browsing_data/browsing_data_remover.cc
@@ -148,6 +148,7 @@ BrowsingDataRemover::BrowsingDataRemover(Profile* profile,
       waiting_for_clear_quota_managed_data_(false),
       waiting_for_clear_server_bound_certs_(false),
       waiting_for_clear_session_storage_(false),
+      waiting_for_clear_shader_cache_(false),
       remove_mask_(0),
       remove_origin_(GURL()),
       origin_set_mask_(0) {
@@ -506,6 +507,13 @@ void BrowsingDataRemover::RemoveImpl(int remove_mask,
   }
 #endif
 
+  if (remove_mask & REMOVE_SHADER_CACHE) {
+    waiting_for_clear_shader_cache_ = true;
+    content::RecordAction(UserMetricsAction("ClearBrowsingData_ShaderCache"));
+
+    ClearShaderCacheOnUIThread();
+  }
+
   // Always wipe accumulated network related data (TransportSecurityState and
   // HttpServerPropertiesManager data).
   waiting_for_clear_networking_history_ = true;
@@ -575,7 +583,8 @@ bool BrowsingDataRemover::AllDone() {
       !waiting_for_clear_content_licenses_ &&
       !waiting_for_clear_form_ &&
       !waiting_for_clear_hostname_resolution_cache_ &&
-      !waiting_for_clear_network_predictor_;
+      !waiting_for_clear_network_predictor_ &&
+      !waiting_for_clear_shader_cache_;
 }
 
 void BrowsingDataRemover::Observe(int type,
@@ -769,6 +778,23 @@ void BrowsingDataRemover::DoClearCache(int rv) {
   }
 }
 
+void BrowsingDataRemover::ClearedShaderCache() {
+  // This function should be called on the UI thread.

[jam, 2013/04/02 17:34:50]

nit: redundant comment, remove per style guide

[dsinclair, 2013/04/03 18:59:23]

Done.

+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+
+  waiting_for_clear_shader_cache_ = false;
+  NotifyAndDeleteIfDone();
+}
+
+void BrowsingDataRemover::ClearShaderCacheOnUIThread() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+
+  BrowserContext::GetDefaultStoragePartition(profile_)->AsyncClearDataBetween(
+      content::StoragePartition::kShaderStorage, delete_begin_, delete_end_,
+      base::Bind(&BrowsingDataRemover::ClearedShaderCache,
+                 base::Unretained(this)));
+}
+
 #if !defined(DISABLE_NACL)
 void BrowsingDataRemover::ClearedNaClCache() {
   // This function should be called on the UI thread.