Added GYP defines to dump linux symbols for gpu perf bots and trybots.

scripts/slave/recipe_modules/chromium/config.py

Index: scripts/slave/recipe_modules/chromium/config.py
diff --git a/scripts/slave/recipe_modules/chromium/config.py b/scripts/slave/recipe_modules/chromium/config.py
index 378841bfba43efb53f55c9d323365be7b391c4cc..9a8e5bfcf14b0bf2430e5d29821c0384bce0bd31 100644
--- a/scripts/slave/recipe_modules/chromium/config.py
+++ b/scripts/slave/recipe_modules/chromium/config.py
@@ -487,6 +487,7 @@ def _memory_tool(c, tool):
 def trybot_flavor(c):
   fastbuild(c, optional=True)
   dcheck(c, optional=True)
+  linux_dump_symbols(c)
 
 @config_ctx()
 def gn_component_build(c):
@@ -750,6 +751,11 @@ def chromium_pgo_optimize(c):
   c.gyp_env.GYP_DEFINES['chrome_pgo_phase'] = 2
 
 @config_ctx()
+def linux_dump_symbols(c):
+  if c.TARGET_PLATFORM == 'linux':

[Ken Russell (switch to Gerrit), 2015/04/02 00:28:37]

Given the large number of expectation changes in this CL, and the intended
impact, I think we should restrict this further. Can you figure out a way to
have these changes not apply to Android or Chrome OS?

[David Yen, 2015/04/02 18:27:52]

For android and chrome OS targets TARGET_PLATFORM should be 'android' and
'chromeos'. It looks like this is true for most of the configurations (for
example, none of the blink android expectations were regenerated). The only
exception to this rule is for the "android tester" and
"chromium_linux_linux_chromium_chromeos". Are these configured incorrectly?
Perhaps someone from the infra team can chime in here.

+    c.gyp_env.GYP_DEFINES['linux_dump_symbols'] = 1
+
+@config_ctx()
 def v8_optimize_medium(c):
   c.gyp_env.GYP_DEFINES['v8_optimized_debug'] = 1
   c.gyp_env.GYP_DEFINES['v8_enable_slow_dchecks'] = 1