Add the ability to clear the shader disk cache.

content/browser/storage_partition_impl.cc

Index: content/browser/storage_partition_impl.cc
diff --git a/content/browser/storage_partition_impl.cc b/content/browser/storage_partition_impl.cc
index fbee33d70bea79670fb3dcafe08856453e5cdea8..44da402594d2e46cc0ea4e3fbea7695705e6f851 100644
--- a/content/browser/storage_partition_impl.cc
+++ b/content/browser/storage_partition_impl.cc
@@ -6,6 +6,7 @@
 
 #include "base/utf_string_conversions.h"
 #include "content/browser/fileapi/browser_file_system_helper.h"
+#include "content/browser/gpu/shader_disk_cache.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/dom_storage_context.h"
@@ -104,6 +105,19 @@ void ClearAllDataOnIOThread(
   }
 }
 
+void ClearedShaderCacheOnIOThread(base::Closure callback) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  BrowserThread::PostTask(BrowserThread::UI, FROM_HERE, callback);
+}
+
+void ClearShaderCacheOnIOThread(base::FilePath path,
+    base::Time begin, base::Time end, base::Closure callback) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  ShaderCacheFactory::GetInstance()->ClearByPath(
+      path, begin, end,
+      base::Bind(&ClearedShaderCacheOnIOThread, callback));
+}
+
 void OnLocalStorageUsageInfo(
     const scoped_refptr<DOMStorageContextImpl>& dom_storage_context,
     const std::vector<dom_storage::LocalStorageUsageInfo>& infos) {
@@ -293,6 +307,20 @@ void StoragePartitionImpl::AsyncClearData(uint32 storage_mask) {
   }
 }
 
+void StoragePartitionImpl::AsyncClearDataBetween(uint32 storage_mask,
+      const base::Time& begin, const base::Time& end,
+      const base::Closure& callback) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  DCHECK(storage_mask == kShaderStorage);
+
+  if (storage_mask & kShaderStorage) {
+    BrowserThread::PostTask(
+        BrowserThread::IO, FROM_HERE,
+        base::Bind(&ClearShaderCacheOnIOThread, GetPath(), begin, end,
+            callback));
+  }
+}
+
 void StoragePartitionImpl::SetURLRequestContext(
     net::URLRequestContextGetter* url_request_context) {
   url_request_context_ = url_request_context;