Added video capture capabilities retrieval and caching to VideoCaptureManager

content/browser/renderer_host/media/video_capture_manager_unittest.cc

Index: content/browser/renderer_host/media/video_capture_manager_unittest.cc
diff --git a/content/browser/renderer_host/media/video_capture_manager_unittest.cc b/content/browser/renderer_host/media/video_capture_manager_unittest.cc
index c794195683aa3197f750c599f9614b6a42609498..a05096e509ac69fde628eac3e054abae0f04546f 100644
--- a/content/browser/renderer_host/media/video_capture_manager_unittest.cc
+++ b/content/browser/renderer_host/media/video_capture_manager_unittest.cc
@@ -165,6 +165,37 @@ TEST_F(VideoCaptureManagerTest, CreateAndClose) {
   vcm_->Unregister();
 }
 
+// Try to enumerate devices, then check their capture capabilities.
+TEST_F(VideoCaptureManagerTest, EnumerateDevicesAndCheckCapabilities) {
+  StreamDeviceInfoArray devices;
+
+  EXPECT_CALL(*listener_, DevicesEnumerated(MEDIA_DEVICE_VIDEO_CAPTURE, _))
+      .Times(1).WillOnce(SaveArg<1>(&devices));
+  vcm_->EnumerateDevices(MEDIA_DEVICE_VIDEO_CAPTURE);
+  message_loop_->RunUntilIdle();
+
+  StreamDeviceInfoArray::iterator device_it;
+  for (device_it = devices.begin(); device_it != devices.end(); ++device_it) {
+    const media::VideoCaptureCapabilities* device_capabilities =
+        vcm_->EnumerateDeviceCapabilities(*device_it);
+    if (device_capabilities == NULL) continue;
+    DCHECK_GE(device_capabilities->size(), 1u);
+
+    media::VideoCaptureCapabilities::const_iterator format;
+    for (format = device_capabilities->begin();
+         format != device_capabilities->end();
+         ++format) {
+      DCHECK_GE(format->width, 1);
+      DCHECK_GE(format->height, 1);
+      DCHECK_GE(format->frame_rate, 1);
+      DVLOG(1) << " Device name: " << device_it->device.name << ", format ("
+               << format->width << "x" << format->height << ")@"
+               << format->frame_rate << "fps";
+    }
+  }
+  vcm_->Unregister();
+}
+
 // Open the same device twice.
 TEST_F(VideoCaptureManagerTest, OpenTwice) {
   StreamDeviceInfoArray devices;