Move Linux/Android breakpad implementation to breakpad component

components/breakpad/app/breakpad_client.h

Index: components/breakpad/app/breakpad_client.h
diff --git a/components/breakpad/breakpad_client.h b/components/breakpad/app/breakpad_client.h
similarity index 96%
rename from components/breakpad/breakpad_client.h
rename to components/breakpad/app/breakpad_client.h
index 621ea1b2525dd7e3aee7b2e93a1c92b44db57790..6a514d00dfe6965cf53ac93748e60ca5c7899c2a 100644
--- a/components/breakpad/breakpad_client.h
+++ b/components/breakpad/app/breakpad_client.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef COMPONENTS_BREAKPAD_BREAKPAD_CLIENT_H_
-#define COMPONENTS_BREAKPAD_BREAKPAD_CLIENT_H_
+#ifndef COMPONENTS_BREAKPAD_APP_BREAKPAD_CLIENT_H_
+#define COMPONENTS_BREAKPAD_APP_BREAKPAD_CLIENT_H_
 
 #include <string>
 
@@ -33,8 +33,10 @@ class BreakpadClient;
 // breakpad code is called, and should stay alive throughout the entire runtime.
 void SetBreakpadClient(BreakpadClient* client);
 
+#if defined(BREAKPAD_IMPLEMENTATION)
 // Breakpad's embedder API should only be used by breakpad.
 BreakpadClient* GetBreakpadClient();
+#endif
 
 // Interface that the embedder implements.
 class BreakpadClient {
@@ -139,4 +141,4 @@ class BreakpadClient {
 
 }  // namespace breakpad
 
-#endif  // COMPONENTS_BREAKPAD_BREAKPAD_CLIENT_H_
+#endif  // COMPONENTS_BREAKPAD_APP_BREAKPAD_CLIENT_H_