Send compressed histograms with system logs when sending feedback.

chrome/common/extensions/api/feedback_private.idl

Index: chrome/common/extensions/api/feedback_private.idl
diff --git a/chrome/common/extensions/api/feedback_private.idl b/chrome/common/extensions/api/feedback_private.idl
index 93f799c3c5702009177bae1d86393a3e45344e2e..ba48e72a4ca70092cac3016c2ff30e88e41859a8 100644
--- a/chrome/common/extensions/api/feedback_private.idl
+++ b/chrome/common/extensions/api/feedback_private.idl
@@ -47,6 +47,9 @@ namespace feedbackPrivate {
     // feedback report.
     SystemInformation[]? systemInformation;
 
+    // True if we have permission to add histograms to this feedback report.
+    boolean sendHistograms;

[rkc, 2013/11/01 19:57:39]

I would rather not modify the .idl for this. We can instead add a canary field
to the system information itself like,
"sendHistograms: 'true'"

Then in the sendFeedback implementation, check if that field exists in system
information, if so, remove it from system information and attach the histograms.

(In fact, later we should move the traceId field also out of this idl and find a
cleaner solution for these extra payloads for the feedback report - but that is
a separate task that isn't in the scope of this CL).

[michaelpg, 2013/11/01 22:14:50]

As we discussed we'll keep this in the .idl for now along with traceId.

+
     // TODO(rkc): Remove these once we have bindings to send blobs to Chrome.
     // Used internally to store the blob uuid after parameter customization.
     DOMString? attachedFileBlobUuid;