Web MIDI: add RequestMIDISysExPermission to BrowserContext

Add RequestMIDISysExPermission to handle Web MIDI API permissions for
system exclusive messages in content embedder.

BUG=163795, 257618
TEST=none
TBR=benm@chromium.org

Review URL: https://chromiumcodereview.appspot.com/18647002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@211437 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 25 insertions, 4 deletions

diff --git a/content/public/browser/browser_context.h b/content/public/browser/browser_context.h
index 1fb1052..c7b916f 100644
--- a/content/public/browser/browser_context.h
+++ b/content/public/browser/browser_context.h
@@ -44,10 +44,6 @@ class StoragePartition;
 // thread.
 class CONTENT_EXPORT BrowserContext : public base::SupportsUserData {
  public:
-  // Used in ForEachStoragePartition(). The first argument is the partition id.
-  // The second argument is the StoragePartition object for that partition id.
-  typedef base::Callback<void(StoragePartition*)> StoragePartitionCallback;
-
   static DownloadManager* GetDownloadManager(BrowserContext* browser_context);
 
   // Returns BrowserContext specific external mount points. It may return NULL
@@ -59,6 +55,7 @@ class CONTENT_EXPORT BrowserContext : public base::SupportsUserData {
       BrowserContext* browser_context, SiteInstance* site_instance);
   static content::StoragePartition* GetStoragePartitionForSite(
       BrowserContext* browser_context, const GURL& site);
+  typedef base::Callback<void(StoragePartition*)> StoragePartitionCallback;
   static void ForEachStoragePartition(
       BrowserContext* browser_context,
       const StoragePartitionCallback& callback);
@@ -128,6 +125,16 @@ class CONTENT_EXPORT BrowserContext : public base::SupportsUserData {
           const base::FilePath& partition_path,
           bool in_memory) = 0;
 
+  typedef base::Callback<void(bool)> MIDISysExPermissionCallback;
+
+  // Requests a permission to use system exclusive messages in MIDI events.
+  // |callback| will be invoked when the request is resolved.
+  virtual void RequestMIDISysExPermission(
+      int render_process_id,
+      int render_view_id,
+      const GURL& requesting_frame,
+      const MIDISysExPermissionCallback& callback) = 0;
+
   // Returns the resource context.
   virtual ResourceContext* GetResourceContext() = 0;
 
diff --git a/content/public/test/test_browser_context.cc b/content/public/test/test_browser_context.cc
index 05f40e8..3e909c2 100644
--- a/content/public/test/test_browser_context.cc
+++ b/content/public/test/test_browser_context.cc
@@ -99,6 +99,15 @@ TestBrowserContext::GetMediaRequestContextForStoragePartition(
   return NULL;
 }
 
+void TestBrowserContext::RequestMIDISysExPermission(
+      int render_process_id,
+      int render_view_id,
+      const GURL& requesting_frame,
+      const MIDISysExPermissionCallback& callback) {
+  // Always reject requests for testing.
+  callback.Run(false);
+}
+
 ResourceContext* TestBrowserContext::GetResourceContext() {
   if (!resource_context_)
     resource_context_.reset(new MockResourceContext());
diff --git a/content/public/test/test_browser_context.h b/content/public/test/test_browser_context.h
index 2106938..e877059 100644
--- a/content/public/test/test_browser_context.h
+++ b/content/public/test/test_browser_context.h
@@ -40,6 +40,11 @@ class TestBrowserContext : public BrowserContext {
       GetMediaRequestContextForStoragePartition(
           const base::FilePath& partition_path,
           bool in_memory) OVERRIDE;
+  virtual void RequestMIDISysExPermission(
+      int render_process_id,
+      int render_view_id,
+      const GURL& requesting_frame,
+      const MIDISysExPermissionCallback& callback) OVERRIDE;
   virtual ResourceContext* GetResourceContext() OVERRIDE;
   virtual GeolocationPermissionContext*
       GetGeolocationPermissionContext() OVERRIDE;