Build mac and linux release builds with symbols and don't strip them by default

build/common.gypi

Index: build/common.gypi
diff --git a/build/common.gypi b/build/common.gypi
index 820e8e44a2db403cdf31d182c1704c4dbfd8cc78..4072ad56d72a65b8596cbe7e34caec92377a65d4 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -930,7 +930,7 @@
 
     # The default value for mac_strip in target_defaults. This cannot be
     # set there, per the comment about variable% in a target_defaults.
-    'mac_strip_release%': 1,
+    'mac_strip_release%': 0,
 
     # Set to 1 to enable code coverage.  In addition to build changes
     # (e.g. extra CFLAGS), also creates a new target in the src/chrome
@@ -1022,7 +1022,7 @@
     # Enable strict glibc debug mode.
     'glibcxx_debug%': 0,
     # And if we want to dump symbols for Breakpad-enabled builds.
-    'linux_dump_symbols%': 0,
+    'linux_dump_symbols%': 1,
     # And if we want to strip the binary after dumping symbols.
     'linux_strip_binary%': 0,
     # Strip the test binaries needed for Linux reliability tests.
@@ -1391,6 +1391,13 @@
       ['OS=="mac"', {
         # Enable clang on mac by default!
         'clang%': 1,
+        'conditions': [
+          # All Chrome builds have breakpad symbols, but only process the
+          # symbols from official builds.
+          ['(branding=="Chrome" and buildtype=="Official")', {
+            'mac_strip_release%': 1,
+          }],
+        ],
       }],  # OS=="mac"
       ['OS=="mac" or OS=="ios"', {
         'variables': {