Refactor the memory profiler code to return the struct. (#37155)

Refactor the memory profiler code to return the struct and handle the
serializing in servointernal page.
This allows other users of the memory profiler to see the whole report
without parsing json.

Testing: I do not know if the memory page is covered by tests.

---------

Signed-off-by: Narfinger <Narfinger@users.noreply.github.com>

components/shared/profile/mem.rs

@@ -247,8 +247,19 @@ macro_rules! path {
 /// The results produced by the memory reporter.
 #[derive(Debug, Deserialize, Serialize)]
 pub struct MemoryReportResult {
-    /// The stringified output.
-    pub content: String,
+    /// All the results from the MemoryReports
+    pub results: Vec<MemoryReport>,
+}
+
+#[derive(Debug, Deserialize, Serialize)]
+/// A simple memory report
+pub struct MemoryReport {
+    /// The pid of the report
+    pub pid: u32,
+    /// Is this the main process
+    pub is_main_process: bool,
+    /// All the reports for this pid
+    pub reports: Vec<Report>,
 }
 
 /// Messages that can be sent to the memory profiler thread.