Compile specific parts of the Android build with -O2.

base/third_party/dynamic_annotations/dynamic_annotations.gyp

Index: base/third_party/dynamic_annotations/dynamic_annotations.gyp
diff --git a/base/third_party/dynamic_annotations/dynamic_annotations.gyp b/base/third_party/dynamic_annotations/dynamic_annotations.gyp
index f526c7ff9647ffc57b40135fcd95dd59858631ba..12c194c5e65096dc79f058148e762d2ea9be5e94 100644
--- a/base/third_party/dynamic_annotations/dynamic_annotations.gyp
+++ b/base/third_party/dynamic_annotations/dynamic_annotations.gyp
@@ -3,6 +3,18 @@
 # found in the LICENSE file.
 
 {
+  'target_defaults': {
+    'configurations': {
+      'Release': {
+        'conditions': [
+          ['OS=="android"', {
+            'cflags!': ['-Os'],
+            'cflags': ['-O2'],
+          }],
+        ],
+      },
+    },
+  },
   'targets': [
     {
       'target_name': 'dynamic_annotations',