Split the chrome_browser.gypi source list a bit more

This is a follow-up to https://codereview.chromium.org/725343003 to
pull out a few more blocks of sources that are currently needed for
downstream iOS.

BUG=432994

Review URL: https://codereview.chromium.org/735813003

Cr-Commit-Position: refs/heads/master@{#306889}
diff --git a/chrome/browser/BUILD.gn b/chrome/browser/BUILD.gn
index 446bf33..9669ac3 100644
--- a/chrome/browser/BUILD.gn
+++ b/chrome/browser/BUILD.gn
@@ -158,6 +158,12 @@
     sources += rebase_path(gypi_values.chrome_browser_bookmark_sources,
                            ".",
                            "//chrome")
+    sources += rebase_path(gypi_values.chrome_browser_browser_process_sources,
+                           ".",
+                           "//chrome")
+    sources += rebase_path(gypi_values.chrome_browser_content_settings_sources,
+                           ".",
+                           "//chrome")
     sources +=
         rebase_path(gypi_values.chrome_browser_favicon_sources, ".", "//chrome")
     sources +=
@@ -186,8 +192,12 @@
                            ".",
                            "//chrome")
     sources +=
+        rebase_path(gypi_values.chrome_browser_session_sources, ".", "//chrome")
+    sources +=
         rebase_path(gypi_values.chrome_browser_signin_sources, ".", "//chrome")
     sources +=
+        rebase_path(gypi_values.chrome_browser_ssl_sources, ".", "//chrome")
+    sources +=
         rebase_path(gypi_values.chrome_browser_sync_sources, ".", "//chrome")
     sources += rebase_path(gypi_values.chrome_browser_web_resource_sources,
                            ".",